Question

[Lê Quỳnh Anh]

Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.

This warning sign indicates that you ____ step on the grass.

A. shouldn't

B. mustn't

C. don't have to

D. ought not to

Answer 1

[Dương Hoàn Anh]

Đáp án B