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

When the concert _____, the fans had already started shouting with excitement.

A. began

B. begins

C. were beginning

D. had begun

Đáp án
A. began

Câu hỏi thuộc Bài tập:

ENGLISH 9- 26/12/2025