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 playing or swimming in the pool, children ____ be accompanied by their parents.

A. should

B. mustn’t

C. don't have to

D. have not to

Đáp án
A. should

Câu hỏi thuộc Bài tập:

E11- Unit 2- Test for Unit