题目内容
【题目】—It’s our duty our city clean and beautiful.
—Yes. We should do something for it.
A. to keep B. keep C. keeping
【答案】A
【解析】选A。考查动词不定式的用法。It’s +adj. /n. +to do sth. 句式结构中, it是形式主语, 动词不定式(短语)是真正主语。
练习册系列答案
相关题目
题目内容
【题目】—It’s our duty our city clean and beautiful.
—Yes. We should do something for it.
A. to keep B. keep C. keeping
【答案】A
【解析】选A。考查动词不定式的用法。It’s +adj. /n. +to do sth. 句式结构中, it是形式主语, 动词不定式(短语)是真正主语。