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

Câu hỏi

Tell them to stop and take a rest. They ________ long enough.

A. have worked

B. had worked

C. have been working

D. had been working

Đáp án
C. have been working

Câu hỏi thuộc Bài tập:

Ôn thi vào lớp 10 _ đề số 5 (tập 2)