Question

The teacher asked more ________ to prevent the students’ eyes from _______.

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

Answer 1

C
考查非谓语动词的被动式。ask sth. to be done是“要求某事被做”的意思，more与do的关系是被动的；prevent sb./sth. from being done阻止……被做；eye与injure的关系也是被动的。