Question

---Tom enjoys______basketball on Sunday afternoons，doesn’t he?
---Yes，he does.But what his sister enjoys______.

1. A.
   to play；dancing
2. B.
   playing；to dance
3. C.
   to play；to dance
4. D.
   playing；is to dance

Answer 1

A
address所表示的动作发生在谓语动词所表示的动作之前,且与letter之间逻辑上存在着被动关系,having been addressed...在句中作非限制性定语。