Question

--Did Alan enjoy seeing his old friends yesterday?

--Yes, he did. He ________ his old friends for a long time.

1. A.
   didn't see
2. B.
   wouldn't see
3. C.
   hasn't seen
4. D.
   hadn't seen

Answer 1

D
句意：--昨天艾伦见到他的老朋友高兴吗？--高兴，他很长时间没有看到他的老朋友了。根据题干可知enjoy是过去发生的动作，而not see这一动作发生在enjoy之前，即过去的过去，故用过去完成时，因此答案为D。