Question

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

1. A.
   to do
2. B.
   done 　
3. C.
   to be done
4. D.
   being done

Answer 1

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