---The book is borrowed from the library. You ____ your children touch it with their dirty hands.
---Sorry.
| A．should have let | B．needn’t have let |
| C．mustn’t have let | D．ought not to have let |
---Let’s see if the basketball game has started yet.
---Started? It must be clear who by now.
| A．is winning | B．wins | C．has won | D．would win |
---Are you still going to Shanghai for the Spring Festival?
---Yes, but I really because I have a lot of things to deal with.
| A．can’t | B．mustn’t | C．won’t | D．shouldn’t |
---Look! The clouds are gathering.
---Yes. I’m afraid it be pouring down soon.
| A．can | B．must | C．should | D．might |
The poor boy the test again; in that case, his mother will be very disappointed.
| A．must have failed | B．might fail | C．could have failed | D．should fail |
I have written to him because he phoned me shortly afterwards.
| A．ought to | B．must | C．couldn’t | D．needn’t |