11.His best film， ______ won several awards，is about the life of Martin Luthur King.

　　A. that

　　B. where

　　C. which

　　D. whether

　　12.Harry Potter is the most interesting book ______ I have ever rea

　　D.

　　A. which

　　B. where

　　C. when

　　D. that

　　13.She has caught cold，because she completely forgot ______ the windows last night.

　　A. locking

　　B. being locked

　　C. to lock

　　D. to have locked

　　14.It is four years ______ she came to this college.

　　A. since

　　B. that

　　C. after

　　D. when

　　15.______ he said at the meeting astonished everybody present

　　A. What

　　B. That

　　C. The fact

　　D. The manner