Mark...

Câu hỏi: Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is best- built from the prompts given.

A. be a doctor , she knows what side - effects the medicine can have

B. being a doctor , she knew what side - effects the medicine could have

C.   have been a doctor , she had known what side - effects the medicine could have

D.  to be a doctor , she knows what side - effects the medicine might have