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

She ______ on her computer for more than two hours when she decided to stop for a rest.

A. has worked

B. has been working

C. was working

D. had been working

Đáp án
D. had been working

Câu hỏi thuộc Bài tập:

Bài tập Ngữ pháp & Từ vựng - Luyện thi THPT Quốc gia Tiếng Anh (Mã 011)