题目内容
【题目】It’s our duty our hometown clean and beautiful.
We must do something for it.
A. keeping B. keeps C. to keep D. kept
【答案】C
【解析】句意：保持我们的家乡干净和美丽是我们的职责。It是形式主语，真正的主语是不定式to keep our hometown clean and beautiful.故选C
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题目内容
【题目】It’s our duty our hometown clean and beautiful.
We must do something for it.
A. keeping B. keeps C. to keep D. kept
【答案】C
【解析】句意：保持我们的家乡干净和美丽是我们的职责。It是形式主语，真正的主语是不定式to keep our hometown clean and beautiful.故选C