The old friends stood in silence, glad of each other's presence without the _______ to say anything.

A. need

B. want

C. lack

D. loss

How long would it take us to that planet if we could travel _______ the speed of light?

A. from

B. to

C. on

D. at

Her friend took _______ of her generosity, borrowing her more money. *

A. mistake

B. error

C. benefit

D. advantage

Can you name some _______ costumes for women in Vietnam?

A. tradition

B. traditional

C. traditionally

D. traditionalist

 All the patients wll receive treatment _______ the strange disease without any expense

A. to

B. by

C. for

D. at

Some peple respect the chancellor for his wisdom, _______ others dislike him because of his strictness.

A. as long as

B. in case

C. whereas

D. whether

The manager, along with some other members, _______ designing a new poster when we came.

A. were

B. was

C. are

D. is

Giải pt \(\log_2^2x-log_24x+2=0\)

Tập nghiệm của bất pt \(\log_{\dfrac{1}{2}}\left(x+1\right)-log_{\dfrac{1}{2}}\left(2x-1\right)< 2\)

Câu 17: Những bệnh (hội chứng) nào sau đây thuộc loại bệnh di truyền phân tử?

1. Hội chứng Down.

2. Bệnh máu khó đông.

3. Hội chứng Turner.

4. Bệnh bạch tạng.

5. Bệnh ưng thư máu.

6. Bệnh thiếu máu hồng cầu hình liềm.

7. Bệnh phêninkêtô niệu.

A. 1, 2, 3, 7.                           

B. 2, 5, 6, 7.                           

C. 2, 4, 6, 7.                     

D. 3, 4, 6, 7.