Question

He is used ________ exercise in the morning．

1. A.
   to take
2. B.
   to taking
3. C.
   take
4. D.
   taking

Answer 1

B
因为be used to…表示“习惯于……”，to为介词，若其后接动词时，则要用动词-ing形式，所以正确答案是B。