题目内容
9._______ the protective glasses when you begin the experiment,please.( )A. | Wear | B. | Wearing | C. | Worn | D. | To wear |
分析 当你开始试验时请带上防护眼镜.
解答 答案是A.考查祈使句,构成是:动词原形+其他.题干前半部分祈使句,后半部分是when引导的时间状语从句,故答案是A.
点评 解答此类问题,首先需要判断题干所属的句型,然后结合句子所缺成分和句型构成选择正确答案.
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