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

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

A. have been sitting　　　　　　　　　　 B. am sitting

C. had been sitting　　　　　　　　　　　 D. was sitting

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

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

A. have been sitting B. am sitting　 C. had been sitting 　 D. was sitting

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

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

A. have been sitting B. am sitting　 C. had been sitting 　 D. was sitting

-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