Question

I ________ at the station half an hour ago, but the train ________ yet．

1. A.
   arrive;didn’t come
2. B.
   was arriving;hadn’t come
3. C.
   arrived;hasn’t come
4. D.
   had arrived;didn’t come

Answer 1

C
解析：
半小时以前表明是发生在过去的动作，第一空要用一般过去时；但是到现在火车还没来，故第二空用现在完成时。