Ex2. 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

By the time she arrived at the train station, the train _____ already.

A. started

B. had started

C. has started

D. starts

Đáp án
B. had started

Câu hỏi thuộc Bài tập:

ENGLISH 9- 26/12/2025