Ở đậu hà lan, alen A quy định thân cao trội hoàn toàn so với alen a quy định thân thấp; alen B quy định hoa đỏ trội hoàn toàn so với alen b quy định hoa trắng, các gen này nằm trên các NST thường khác nhau. Biết rằng không xảy ra đột biến, theo lý thuyết, trong các phép lai sau, phép lai nào cho đời con có số cây thân thấp, hoa đỏ chiếm tỉ lệ 25%?

A. AaBb × Aabb.

B. AaBB × aaBb.

C. Aabb × aaBb.

D. aaBb × aabb.

Quá trình thoát hơi nước không có vai trò nào sau đây?

A. Là động lực đầu trên của dòng mạch gỗ.

B. Tạo điều kiện cho CO₂ khuếch tán vào lá để thực hiện quá trình quang hợp.

C. Cung cấp nguyên liệu cho quá trình quang hợp và hô hấp diễn ra với tốc độ bình thường.

D. Làm giảm nhiệt độ của bề mặt lá vào những ngày nắng nóng, đảm bảo cho quá trình sinh lý diễn ra bình thường.

Bán kính hình tròn B gấp 3 lần bán kính hình tròn A. Nếu hình A lăn xung quanh hình B, nó phải thực hiện bao nhiêu vòng quay để trở lại điểm xuất phát?

1. When I was young, I wanted to become a famous -------- and work with
all the top models in Paris and Milan.
A. computer programmer
B. fashion designer
C. shop assistant
D. electrical engineer
2. Can you fix my printer for me? My office is ------ the third floor. The
printer is ------- to my desk.
A. on/next B. in/opposite C. at/next D. on/on
3. They ------- billions of dollars in the last decade in order to build mines
and get the oil out of the ground.
A. spend B. have spent C. spent D. had spent
4. Can you help me to ----- some -----? There are clothes on the floor and
the dishes need washing.
A. make/house work B. do/homework C.
do/housework D. do/favour
5. We would like to recruit three people for the positions of sales
representative. Email info@hgmsales.com for a(an) ----------- form and
a full job description.
A. applicant B. contact details C. salary D.
application
6. The windows go transparent on buildings --------the sun shines brightly
and this will save on lighting bills.
A. who B. which C. where D. that
7. Jane: What social networking site are you using?
James: I’ve just ------ an account on Weibo. Facebook will be banned
in Vietnam, I guess.
A. searched B. subscribed C. uploaded D. set up
8. ------------ I get home, my cats usually ------ and rub their heads against
my feet.
A. When/come B. If/will come C. If/would come D.
When/would come
9. Peter: ---------------------------------
Tom: Just press the red button. You’ll see the screen appear right away.
A. What happens if I press this button?
B. How do you switch it on?
C. Why do you need to do that?
D. What is this for?
10. I don’t have a degree or anything like that, but I have learned lots of --
------ on the job.
A. qualifications B. timetable C. skills D. subjects
11. The school newsletter -------- until next week, so we don’t know the
new term dates.
A. doesn’t publish B. isn’t published C. will publish
D. will be published
12. A few years ago, the stone ---------- near to the old capital of an
ancient people called the Olmec.
A. discover B. discovered C. is discovered D. was
discovered
13. My family always ------------for celebrations and during the holidays.
A. get together B. pick up C. get along D. take away
14. Let me take your details and I’ll keep the place for you until the
weekend. -------, I’ll confirm it.
A. It’s very easy
B. After we’re received payment
C. To enrol
D. You can go online
15. The Outdoor Store can supply all your ----------- needs this summer
with high quality tents, cooking equipment and sleeping bags.
A. cruise B. catering C. camping D. sightseeing
16. Before I visited northern Norway, I --------- to many parts of the world,
including the southernmost point of Patagonia.
A. have been B. had been C. went D. have gone
17. On a clear day at the top, you get a spectacular view of the whole
mountain range. It has ----- views.
A. ancient B. unforgettable C. stunning D. legendary
18. Lots of people are ------- by the ride on rollercoasters at theme parks.
A. frightened B. frightening C. interested D. interesting
19. Engineers in the nineteenth century built these -------so barges could
carry goods on water from the factories to the cities.
A. canals B. tunnels C. subway station D. avenues
20. Passenger: Can you tell me --------------------------?
Ticket clerk: In about half an hour.
A. which train do I take to the city centre
B. which train I take to the city centre
C. what time does the next train leave
D. when the next train leaves
21. We ------------ take a holiday as a family because my parents were
always working.
A. usually B. used to C. didn’t used to D. didn’t use to
22. The archaeologists -------- this object was very important.
A. say B. said C. tell D. told
23. Go outside and do -------- interesting instead of watching TV all the
time.
A. something B. anything C. everyone D. somewhere
24. Unemployment, lack of education and crime are typical examples of --
------- problem.
A. economic B. natural C. social D. traditional
 

Question 1: Because the train is going ____________ the tunnel, it is getting dark, please sit still.

A. at                                 B. through                       C. around                         D. below

Question 2: My mother is on the way. She ____________ home yet.

A. didn’t arrive                                                        B. haven’t arrived

C. hasn’t arrived                                                      D. arrive

Question 3: Last summer, I took a tour to Amazon river. It was amazing. I loved it. I saw beautiful landscapes and  __________ natural mountain ranges.

A. forgettable                  B. unskilled                     C. annoying                     D. stunning

Question 4: When you call the assistant and ask how to apply for the course, _______________ to fill in the form online.

A. then send us the payment                                   B. the first thing you’re asked to do is

C. at the end, click “enrol now”                              D. firstly, I need to do

Question 5: A ____________ means a period of time when people learn something with a teacher.

A. lesson                         B. subject                        C. schedule                      D. enrol

Question 6: Last weekend, we planned to go for a camping trip. On that day, my alarm clock was broken, so I was late. When I ___________, people _________, and I had to stay home all the weekend.

A. had arrived – had left                                         B. had arrived - left

C. arrived – had left                                                D. arrived – left

Question 7: John: Have you chosen the type of holiday yet?

David: Yes, we have. We are going to take the __________.

A. sunbathing                  B. self-catering               C. sun tan lotion              D. package tour

Question 8: Mayan hieroglyphs are the pictures that ____________ by the Maya to tell stories but to represent dates and times from AD 250 to 900.

A. was not used               B. were not used             C. didn’t use to use         D. did not use

Question 9: All the different levels of development that an animal or plant goes through during its life are called a ____________

A. growing cycle                                                     B. life cycle

C. water cycle                                                         D. earth cycle

Question 10: In 2010, Astronomers said that the Hubble Telescope ____________ a new planet.

A. found                          B. had found                    C. find                             D. has found

Question 11: A ____________ is a piece of office furniture with drawers for storing letters, reports etc.

A. notice board                B. bookshelf                    C. filing cabinet              D. desktop lamp

Question 12: The house ____________ they've bought is next to the park.

A. where                          B. in which                      C. which                          D. that

Question 13: Water ____________ if you ____________ it to 100 degrees Celsius.

A. boil, heats                   B. boils, heats                  C. boils, heat                   D. boil, heat

Question 14: Tom is very _________, everybody loves to talk to him.

A. interested                    B. to interest                   C. interest                        D. interesting

Question 15: A ____________ is a piece of equipment shaped like a tube, used for making distant objects look larger and closer.

A. straw                                                                   B. Braille

C. telescope                                                             D. electric light bulb

Question 16: In 1978, ____________ made an important discovery in Mexico City. They found a fourteenth-century pyramid from the ancient civilization of the Aztecs.

A. archaeologists            B. statues                         C. ancient civilization     D. excavate

Question 17: The ____________ is an examination you pass or a course that you have successfully completed, and you need it to get a job or a place at university.

A. skill                            B. discipline                    C. subject                        D. qualification

Question 18: I wanted to stop ____________ some presents, but we didn't have enough time.

A. buying                        B. to buying                    C. to buy                          D. buy

Question 19: Choose the correct conditional sentence according to this sentence: "I must run faster or I will lose the race."

A. If I run faster, I will win the race.                      B. If I don't run faster, I will win the race.

C. If I must run faster, I will lose the race.             D. If I run faster, I will lose the race.

Question 20: Jenny: This letter is in French, and I don't know French. Can you help me?

Beth: Sure, I ____________ it for you.

A. am translate                                                        B. won’t translate

C. will translate                                                       D. am going to translate