Question

-How about my food? I ________ here for almost half an hour．

-I'm sorry, sir．It must be ready by now．

1. A.
   have been sitting
2. B.
   am sitting
3. C.
   had been sitting
4. D.
   was sitting

Answer 1

A
考查时态。根据句中for引导的时间状语可知需要使用现在完成时，选项A是现在完成进行时，可以更好地强调“我一直坐在这”，因此为最佳选项。