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

They tired now because they in the garden since 8 o’clock.

A. are/ worked

B. were/were working

C. are/have been working

D. were/worked

Đáp án
C. are/have been working

Câu hỏi thuộc Bài tập:

They ______ tired now because they ______ in the garden since 8 o’clock.