（2012全国新课程）I use a clock to wake me up because at six o'clock each morning the train comes by my house.
| A．couldn't | B．mustn't |
| C．shouldn't | D．needn't |
It’s ______ to sign up for the cooking contest when you can’t cook a meal by yourself.
| A．reasonable | B．conventional | C．positive | D．ridiculous |
---______, the floor is really slippery.
---Thank you for reminding me.
| A．Mind your step | B．Walk slowly | C．Mind your feet | D．Come this way |
__________ the crisis of economy getting more and more serious, the government is searching for ways to improve people’s life.
| A．As | B．For | C．With | D．On |
He is no longer in good condition, and his ability to work is limited. I _______ him to give up the job but failed.
| A．suggested | B．persuaded | C．tried to persuade | D．managed |
---Shall I keep an eye on your house when you are on holiday? ---________.
| A．It’s up to you | B．Of course you should |
| C．If you should like | D．I would appreciate that |