---_______ they stop to have a rest?
---No, let them go on.
| A．Will | B．Would | C．Shall | D．Should |
“Can I take it away?” “You ___ better not.”
| A．should | B．could | C．would | D．had |
“Let’s go to the library, shall we?” “____”
| A．NO, I can't | B．Yes, I will | C．Yes, thank you | D．NO, we’d better not |
“Do you have to leave now? ” “I’m sorry, but I really ____.”
A. can’t B,have C.should D.must
He ___ be in the garden.He must be in the room.
‘
| A．can't | B．mustn’t | C．will not | D．may not |
He ___ at the meeting this morning.He was in hospital at the time.
| A．couldn’t have spoken | B．mustn’t have spoken | C．shouldn't have spoken |
| D．needn’t have spoken |