Mark the letter A, B, C, or D on your answer sheet to indicate the correct

Câu hỏi :

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Scientists have found a way by which they can convert all blood types into O- type blood,________?

A. can they

B. has it

C. haven't they

D. have they

* Đáp án

A

* Hướng dẫn giải

A. respectful (a): kính cẩn, tỏ vẻ tôn trọng
B. respective (a): riêng, tương ứng
C. respectable (a): đáng kính
D. respected (a): được tôn trọng

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