-She looks very happy.Shehave passed the exam.
-I guess so.It's not difficult after all.
| A． | should | B． | could | C． | must | D． | might |
In dealing with public relations, we should make every effort to prevent the _____ in personality.
| A．contact | B．contrast | C．conflict | D．connection |
I know one of the things _____I was unsure about was _____ hard it would be to climb this mountain.
| A．that; how | B．what; how | C．which; what | D．/; what |
It’s said that there are plenty of hotels in that town. There _____ be any difficulty for you to find one to stay in.
| A．mustn’t | B．oughtn’t | C．needn’t | D．shouldn’t |
Once we discover a mistake, we should not _____ it but correct it immediately, to create better conditions for economic development.
| A．ignore | B．postpone | C．deny | D．sheltered |
The thief took off his shoes when he slipped into the house in order to steal something ___.
| A．unnotice | B．unnoticed | C．unnoticing | D．to unnotice |