He is unreliable. What he says be believed. (Miễn phí)

A. cannot

Đáp án chính xác

She ___ be ill. I have just seen her playing basket ball in the school yard.

A. needn't

B. shouldn't    

C. mustn't

D. can't

Marcela didn’t come to class yesterday. She______ an accident.

A. will have had

B. might have had

C. must have had

D. should have had

Chọn từ thích hợp điền vào chỗ trống:

Keep quiet. You _______ talk so loudly in here. Everybody is working.

A. may

B. must

C. might

D. mustn't

Susan ___ hear the speaker because the crowd was cheering so loudly.

A. mustn't

B. couldn't

C. can't

D. needn't

Hiking the trail to the peak _______ be dangerous if you are not well prepared for dramatic weather changes. You _______ research the route a little more before you attempt the ascent.

A. might / can

B. may / mustn't

C. can / should

D. must / needn't

_______ I have a day off tomorrow? - Of course not. We have a lot of things to do.

A. Must

B. Will

C. May

D. Need