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

Those audiences ____ show their tickets before entering the concert hall.

A. have to

B. must

C. ought to

D. don't have to

Đáp án
A. have to

Câu hỏi thuộc Bài tập:

E11- Unit 2- Test for Unit