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10. Dùng động từ trong ngoặc ở dạng dúng
The world's first computer (1) was built..........(build) at the University of Pennsylvania in 1946,although computer-like machines (2)...were built......(build) in the 19th century.Computers(3)...were sold.......(sell)commercially for the first time in the 1950s, and progress (4)....has been made......(make)since than.Computers are now much smaller and more powerful, and they can (5)..be bought.......(buy)much more cheaply. Computers (6).....have been used....(use) in many fields - in business, science, medicine and education. They can (7)...be used.....(use) to forecast the weather or to control robots which make cars. The computer's memory is the where information (8)..is kept........ (keep) and calculations (9)...are done.. (do). A computer can not think for place itself. It must (10) ....be told......(tell) exacly what to do.A lot of calculations can (11)..be done.......(do)very quickly on a computer Computer don't make mistakes. Stories (12) ....are heard.....(hear) sometimes about computers paying people too much money or sending them bills for things they didn't by. These mistakes (13) ..are made.......(make)by the programmers. Some years ago, an American computer-controlled rocket went out of control and had(14)..been destroyed...... (destroy). The accident (15) .....was caused....(cause) by a small mistake in one line of the program,which cost the USA 18 million dollars. Criminals have found that "computer crimes" are a lot easier than robbing banks. Hundreds of millions of dollars (16)..have been stolen........(steal)from bunesses every by people changing the information in computers. Large numbers of home computers (17).....have been sold....(sell) recently. People know more about computers than they used to, and computers are playing a bigger part in our lives. Progress (18)......is made.... .(make) all the time. Many people believe we can look forward to the day when even our household jobs like cleaning and decorating (19)....are done....(do) by computer-controlled robots.
(1) was built
(2) were built
(3) were sold
(4) has been made
(5) can be bought
(6) are used
(7) be used
(8) is kept
(9) are done
1. If people solve the problem of smoke from vehicles and factories, the air _____ pure and fresh.
A. is B. was C. will be D. would be
2. If you post false information on the Internet, you _____fined.
A. gets B. got C. would get D. will get
3. I believe that if all the people _____ the government’s instructions, we ____COVID-19 from spreading.
A. don’t follow/ will prevent
B. followed/ will prevent
C. follow/ would prevent
D. follow/ will prevent
4. Do you think there would be less conflict in the world if all people _____ the same language?
A. spoke B. speak C. had spoken D. will speak
5. If our schools are still closed because of the pandemic, we _____to study online.
A. wouldn’t B. would try C. tried D. will try
6. If I ____you, I ____many subjects online instead of playing video games.
A. was/ will study B. am/ will study C. were/ would study D. am/ would study
7. If people need more paper, more trees _____.
A. will cut down B. cut down C. will be cut down D. are cutting down
8. My English is not good. If I ___ English well, I ___ able to get a good job in a foreign company.
A. speak/ can be B. spoke / were C. speak/ were D. spoke/ would be
9. If everybody _____to the fight against COVID-19, we will win soon.
A. contribute B. contributes C. are contributing D. is contributed
10. If people protect the forest, a lot of trees _____.
A. will be preserved B. will preserve C. preserve D. would preserve
11. If you were me, what _____?
A. you would do B. will you do C. do you do D. would you do
12. People don’t trust him because he tells lies.
A. If he tells lies, people won’t trust him.
B. If he didn’t tell lies, people would trust him.
C. If he doesn’t tell lies, people will trust him.
D. If he told lies, people wouldn’t trust him.
13. The government limits travel and close contact among people, so we can prevent COVID-19 from spreading.
A. If the government didn’t limit travel and close contact among people, we couldn’t prevent COVID-19 from spreading.
B. If the government doesn’t limit travel and close contact among people, we can prevent COVID-19 from spreading.
C.If the government doesn’t limit travel and close contact among people, we could prevent COVID-19 from spreading.
D. If the government limited travel and close contact among people, we couldn’t prevent COVID-19 from spreading.
14. Wear a face mask when you are with many people, or you will be at risk.
A. If you wear a face mask when you are with many people, you will be at risk.
B. If you don’t wear a face mask when you are with many people, you will be at risk.
C. If you didn’t wear a face mask when you are with many people, you would be at risk.
D. If you don’t wear a face mask when you are with many people, you would be at risk.
18. We/ should/ maintain/ personal space/ avoid/ crowds/ if/ we/ want/ be/ safe/ now.
A. We should be maintained personal space and avoid crowds if we want to be safe now.
B. We should maintain personal space and avoid crowds if we want to be safe now.
C. We should maintain personal space and avoid crowds if we wanted to be safe now.
D. We should maintain personal space to avoid crowds if we want be safe now.
19. Her English/ not/ be/ rusty/ she/ used/ more often.
A. Her English wouldn’t be rusty if she uses it more often.
B. Her English wouldn’t be rusty if she has used it more often.
C. Her English wouldn’t be rusty if she is using it more often.
D. Her English wouldn’t be rusty if she used it more often.
20. If people/ solve/ problem/ smoke from vehicles, the air/ be pure and fresh.
A. If people solved the problem of smoke from vehicles, the air is pure and fresh.
B. If people solve the problem of smoke from vehicles, the air was pure and fresh.
C. If people solve the problem of smoke from vehicles, the air will be pure and fresh.
D. If people solve the problem of smoke from vehicles, the air would be pure and fresh.
1 the internet is ................................ to communicate with people around the world a
a cheap way b an expensive way c an inconvenient way d a difficult way
2 through the internet , businesses can.............................................
a buy goods from each other
b advertise and sell their products
c send their products to customer
d all are correct
3 it takes ............................ to do the shopping to the internet
a a lot of time b a little time c less time d more time
4 which of the fowllowing is true ?
a thanks to the internet , people do not need to go to work
b e-mail can be used to advertise new products
c the internet can be used for education
d students nowdays spend more time going on line than attending school
câu C nha
Câu b