The teacher asked more _____ to prevent the students’ eyes from being injured.

A. to do             B. done 　          C. to be done          D. being done

C


解析:

由ask sb. to do sth.可知此處應(yīng)用不定式。賓語(yǔ)與賓語(yǔ)補(bǔ)足語(yǔ)之間為被動(dòng)關(guān)系，故用to be done。

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