—Where is your uncle? 

—He ______ to Hong Kong. He will come back in two weeks. [ ]

A. has been

B. had been

C. has gone

D. went

麦克尔憩室位于（）。

A.回肠中段

B.回盲部的附近

C.回肠上段

D.空肠下段

E.回肠下段