【題目】_______is every teacher’s duty ________ things clearly to the students.

A. It; to explainB. That; to explainC. This; explainD. It; explain

【答案】A

【解析】

句意:清楚地向?qū)W生解釋事情是每個(gè)老師的職責(zé)?疾楣潭ň湫。本句是“It +系動(dòng)詞+表語+不定式+其他”結(jié)構(gòu),it是形式主語,真正主語是后面的不定式。根據(jù)句意結(jié)構(gòu),可知選A。

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