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
考查時態(tài)。根據(jù)句中for引導(dǎo)的時間狀語可知需要使用現(xiàn)在完成時，選項A是現(xiàn)在完成進行時，可以更好地強調(diào)“我一直坐在這”，因此為最佳選項。