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
