Question

He let me repeat his instruction ________ sure that I understood what was ________ after he went away.

1. A.
   to make; to be done
2. B.
   making; doing
3. C.
   to make; to do
4. D.
   making; to do

Answer 1

A
题目的四个选项有两项是不定式，另两个为现在分词。这里表达的是前面动作的目的而不是伴随情况，因此，很容易就可以排除B、D两项。从后面看，句子的主语是要做的事情，动词不定式应当使用被动形式。动词不定式和分词是英语学习中的重点和难点，在学习时，一定要系统地理解和掌握它们的用法。