15000 bài tập tách từ đề thi thử môn Tiếng Anh có đáp án (Phần 40)

I was tired when you saw me because I____for the exam. A. studied B. have been studying C. had been studying D. would study

177/200

I was tired when you saw me because I____for the exam.

studied

have been studying

had been studying

would study

Giải thích

Đáp án C