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42. The first virus appeared _________.
A.In 1986 B. In 1987 C. In 1990 D. On Friday 13th
43. Computer viruses became extremely dangerous _________.
A.on Friday 13th
B. when the first virus called Brain was created
C. when computers were connected to e-mail and Internet systems
D. in 1987
44. Which statement is TRUE about computer viruses?
A.The Melissa virus is part of the Internet system.
B. The virus Jerusalem is harmless because it did nothing.
C. A computer virus can kill people.
D. computer virus is a program.
45. A “remedy" (paragraph 4) refers to __________.
A.viruses B. programmers C. medicine D. antivirus software
46. The word "which" in the last paragraph refers to __________.
A.a computer virus created by people B. a computer virus
C. a few hours' stoppage caused by people D. the stoppage of the whole world caused by a computer virus
EX2:
7. My coat must have been stolen (must steal). It's no longer here!
8. Pizza and soft drinks are being given away (be giving away) in the student center right now
9. Foods need to be bought (need to buy) for the rest of the week...
10. The printer must have been fixed (must fix) because it's working fine now
EX3: Tìm lỗi sai và sửa
1. Why did Danny, whose -> who totally unfit, decide to enter the marathon?
2. Miranda still has trauma from the tragic accident, that -> which took away her closest friend
3. The office furniture that was ordered last month have -> has just arrived, but we're not sure whether the manager like it
4. Mr. Smith whose -> Mr. Smith, whose car was stolen yesterday, is a professor
5. My uncle, was -> X a businessman, was ranked the weathiest of the country
6. She was the first woman in the Philippines to elect -> be elected as the president of the country
7. We should participate in the movements organizing -> organized to conserve the natural enviroment
8. Jack has won a jackpot prize, 10% of whom -> which was donated to flooded areas
9. All her children have graduated from university, that -> which is the reason for her to be proud
10. Mrs. Brown was the first owner his -> whose dog won 3 prizes in the same show.
Ex4: Tìm lỗi sai và sửa
1. On their trip last year, they help -> helped a lot of disadvantaged and handicapped children
2. At this time 4 years ago, we donate -> were donating food and clothes to low- income people in remote area
3. When I work -> worked with them for the first time, many of them couldn't read or write
4. He has just bought a pencil case to held -> hold his pens and pencils
5. British women overtake -> have overtaken British men in Internet usage since 2005
6. How did your life change -> has your life changed over the past ten years?
7. As planned, we -> are going to drive from our city to the sea
8. Look at the clounds. It is rain -> going to rain.
1:I quite like drinking coffee in the morning,although I wasn't keen on it when I was younger .
=> I didn't use to drink coffee in the morning when I was younger.
2:We seem to have lost interest in our work.
=> We used to have lost interest in our work.
3:I don't mind traveling by train now.
=> I didn't use to travel by train.
4:I went to the church when I was a child.
=> I used to go to the church when I was a child.
5:since we've lived in the countryside,we have been much happier
=> We used to live in the countryside, we used to be much happier.
6:Mr.Michael grew tulips but he doesn't any more.
=> Mr.Michael used to grow tulips.
7:I prefer listening to classical music now,although when I was young I couldn't stand it.
=> I didn't use to listen to classical music when I was young.
8:My sister looked so fat when she returned from Paris.
=> My sister didn't use to be fat before she returned from Paris.
Complete the blanks using " used to " or " didn't use to " + a suitable verb .
1. Mai ............used to travel......... a lot when she was single . These days she doesn't take many trips .
2. My uncle 's family ............used to live............ in Dalat . Now they live in Ho Chi Minh City .
3. You .............didn't use to drink.......... coffee before . Now you drink a lot .
4. Kim ..............used to have ............ very long hair when she was a school girl .
5. This building is now a restaurant . It ...........used to be............... a theater before .
6. Bruno ..............didn't use to eat............. Vietnamese food but now he often eats it .
7. Now I normally go to bed at about 9 o'clock but I ...........used ............ to sleep much later before .
8. When Nam first worked on the farm , he .........used to get up.......... at 5 : 00 in the morning .
II. Complete the sentences with"used to" or "be used to"
1. Jane(work)............USED TO WORK........ for the telephone company, but now she has a job at the post office
2. Did work doesn't brother me. I(work).....................AM USED TO WORKING........... hard. I've worked hard all my life
3. Dick(have)...................USED TO HAVE.......... mustache. but he doesn't any more. He shaved it off because his wife didn't like it. I (see, not)........AM NOT USED TO SEEING............... him without his mustache. He still looks strange to me
4. When I was a child, I (think)...............USED TO THINK....................anyone over 40 was old. Of course, now that I'm middle- aged, I agree with those who say"Life begins at 40"
5. It(take)............................USED TO TAKE................ weeks or months to cross the Atlantic Ocean from Europe to American , but now it takes only a matter of hours
6. Even though Jason is only 12, he(fly)......................USED TO FLY........... on airplane. His father is pilot and has taken Johnson with him in a plane many times
7. Michale(take)................IS USED TO TAKING....................... care of himself. He left home when he was 15 and has been on his own ever since
8. When I was growing up, my mother often sent me to the neighborhood store to get something for her. And each time I went there, Mr. Ditmar, the owner,(give).............USED TO GIVE......... me a piece of candy
Viết lại câu sử dụng mệnh đề quan hệ
1. A man answer the phone. He told me you were away
=> a man who answer the phone, told me you were away
2. They volunteer to help the victims. Their houses were destroyed by a flood
=> they volunteer to help the victims whose houses were destroyed by a flood
3. Joan was planning to go to the conference. Her colleagues were waiting for him there
=> Joan was planning to go to the conference whose colleagues were waiting for him there
4. A waitress served us. She was very impolite and impatient
=> a waitress who served us was very impolite and impatient
5. He has written a lot of emails. He has contacted his friends all over the world via emails
=> he who has written a lot of emails has contacted his friends all over the world via emails
6. I met Alice's father. He worked at the university
=> i met Alice's father who worked at the university
7. A girl was injured in the accident. She is now in hospital
=> a girl who was injured in the accident is now in hospital
8. The film The Dark terrified her a lot. She watched it last night
=> The film The Dark terrified her a lot which she watched last night
9. A building was destroyed in the fire. It has now been rebuilt
=> A building was destroyed in the fire which has now been rebuilt
10. John Bridge is one of my oldest friends. He has just gone to live in Canada
=> John Bridge who is one of my oldest friends has just gone to live in Canada
11. Don't use this product. It is not suitable to your hair
=> Don't use this product which isn't suitable to your hair
12. The birds have flown away. I found their nest in the tree behind my house
=> The birds have flown away i found whose nest in the tree behind my house
13. Some people were arrested. They have now been release
=> some people who were arrested have now been release
14. He is curious about the reason. She has been sa in recent day for that reasson
=> he who is curious about the reason has been sa in recent day for that reasson
Rewrite
1.Her new idea of the new vaccine was fully accepted by the scientists (appreciated)
-->Her new idea of the new vaccine was appreciated positively by the scientists.
2. They are depending for success on their new player (hope)
-->They hope their new player succesful.
3. I surely will not sell this house just because I'm broke (intention)
-->I surely will not have a intention of selling this house just because I'm broke.
4. Her desire is to help bring the knowledge to all unfortunated children in Vietnam (desire)
-->She desires to help bring the knowledge to all unfortunated children in Vietnam.
5. The company has tried its best to minimize the negative effect of the economic crisis (effort)
-->The company's effort is tried its best to minimize the negative effect of the economic crisis .
6. You don't have to ask for my permission to use the computer as I gave it to you (need) (n)
-->You don't need to ask for my permission to use the computer as I gave it to you .
7. I used to love playing computer games very much, but I quit it now (interest)
-->In the past, I interested in playing computer games very much, but I quit it now .
1.Her new idea of the new vaccine was fully accepted by the scientists (appreciated)
-->Her new idea of the new vaccine was appreciated positively by the scientists.
2. They are depending for success on their new player (hope)
-->They hope their new player succesful.
3. I surely will not sell this house just because I'm broke (intention)
-->I surely will not have a intention of selling this house just because I'm broke.
4. Her desire is to help bring the knowledge to all unfortunated children in Vietnam (desire)
-->She desires to help bring the knowledge to all unfortunated children in Vietnam.
5. The company has tried its best to minimize the negative effect of the economic crisis (effort)
-->The company's effort is tried its best to minimize the negative effect of the economic crisis .
6. You don't have to ask for my permission to use the computer as I gave it to you (need) (n)
-->You don't need to ask for my permission to use the computer as I gave it to you .
7. I used to love playing computer games very much, but I quit it now (interest)
-->In the past, I interested in playing computer games very much, but I quit it now .
Viết lại câu sao cho nghĩa không đổi:
1. No one has used this computer for a long time
This computer........hasn't been used for a long time.........
2. The clock was made in China. My mother gave it to me on my bỉthday
The clock which.....My mother gave to me on my bỉthday was made in china............
3. I haven't seen my uncle for ten years
I last.........saw my uncle was ten years........
4. Last year, the Browns often bought groceries in this shop but now they don't
The Browns.......used to buy groceries in this shop last year..........
5. The taxi driver is friendly. He took me to the airport
The taxi driver who.........took me to the airport is friendly.....
1 to introduce => introduced
2 has seemed => seems
3 for => to
4 study =>studying
5 changed => has changed
6 meet => meeting