题目内容
18.When a person stops breathing,open their mouthto see (see) if there is food at the back of their mouth.分析 当一个人停止呼吸,张开他们的嘴看看在嘴后面有没有食物.
解答 答案是to see.本题考查动词不定式表示目的;题干中已经有了谓语动词open,所以see只能以非谓语的形式出现;分析语境可知,张开他们嘴的"目的是看"嘴后面是否有食物,故答案是to see.
点评 本题是要求用所给词的适当形式填空,解题时首先考虑句中需要的词性;其次,如果是谓语动词关注时态、语态和数的变化;如果是非谓语动词要联系非谓语的基本用法判断非谓语的形式;如果是名词关注单复数.
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