（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 |
相关试题
Food safety is _____ important, so the government spares no efforts to prevent food pollution.
| A．highly | B．eventually | C．gradually | D．easily |
Have a good look round the room to you have packed everything for holiday.
| A．make it | B．make sense | C．make sure | D．make up |
That’s all that I have to say. Is there anything you’d like to , Terry?
| A．talk | B．require | C．add | D．lift |
The direction _____ which the president would go was kept secret _____ safety concern.
| A．for; over | B．from; about | C．i n; for |
D．at; as |
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