Question

Joan stood outside a shopping mall for a long time, as if ________ somebody

1. A.
   to wait for
2. B.
   waiting for
3. C.
   waited for
4. D.
   having waited for

Answer 1

B
试题分析：考查非谓语动词。Joan和wait是主谓关系，用现在分词表主动和伴随状况，排除C；动词不定式表示目的，不符合语境，排除A；having done是现在分词的完成时，表示动作有先后，这里的stood和wait是同时发生的，排除D。waiting for相当于he was waiting for。故选B。
考点：考查非谓语动词