Question

--- When did Tom come to Qingdao？
--- It was in July，2006 and he ______ a trip in China with his parents at that time.

1. A.
   would take
2. B.
   had taken
3. C.
   was taking
4. D.
   had been taking

Answer 1

C
考查动词的时态。根据句子，指的是过去时间，且at that time是进行时态的时间状语，所以表过去那个时候正在发生的事，要用过去进行时态。选C。