In China.you vote when you are 18．( )A．mustB．mightC．canD．would 题目和参考答案——青夏教育精英家教网——

题目内容

5．In China，you vote when you are 18．（　　）

A．

must

B．

might

C．

can

D．

would

分析在中国，当你年满18周岁时可以参与选举．

解答答案：C．
A must表示主观上的必须，可能性最大；B might可能，语气最弱，可能性最小；C can表达具备某种能力，在本句中年满18周岁是具备选举的一个前提条件；D would表示过去将来或者过去经常性或习惯性的动作，可能性比can小；根据句意"当你年满18周岁时"可以（can）参与选举；故选C．

点评 can可以表示能力或者可能性：
1）表能力时意味着凭体力或脑力或技术等可以无甚阻力地去做某事．
I can climb this pole．我能爬这根杆子．
2）can 用在肯定句中表示理论上的可能性（一时的可能）．
A horse in the center of London can cost a lot of money．

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