The key you have just got     the front door. 
#102563
A
is used to opening
B
is used to be opened
C
is used to being opened
D
is used to open
推荐题目
Hi, Mike. I’ve to borrow your car this afternoon mine _______ in the garage.
#99388
A
is repairing
B
is being repaired
C
has repaired
D
has been repaired
His sister left home in 1998, and _________ since then. 
#100164
A
hadnotbeenheard
B
hasnotbeenheardof
C
hadnotheardof
D
hasnotheardof