题目内容
6.____necessary that we should wear helmets when we are riding a bike( )| A. | It's | B. | They're | C. | We're |
分析 当我们骑自行车的时候我们应该戴头盔是必须的.
解答 答案:A.考查形式主语.句意:当我们骑自行车的时候我们应该戴头盔是必须的.根据题干____ necessary that we should wear helmets when we are riding a bike.可知这是It is+adj+that从句.it做形式主语.It is/was+形容词+that主语从句,多数情况下用虚拟语气,表达一种要求,命令或者责备. 句子为一般现在时.故选A.
点评 了解句子结构以及意思以及形式主语的用法,再结合具体语境进行选择.
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