I was tired when you saw me because I __ for the exam

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.

A. studied

B. have been studying

C. had been studying

D. would study

* Đáp án

C

* Hướng dẫn giải

Đáp án C

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