The key ____ for opening the door of the room.
#60152
A
uses
B
is using
C
is used
D
used
推荐题目
what is your brother able--------?
#61223
A
to do
B
do
C
to doing
D
does
How many states _______ the United States? Fifty. 
#57159
A
turn up
B
make up
C
end up
D
give up
I’m tired now. Let’s stop ________.
#61657
A
having a meal
B
having a rest
C
to have a meal
D
to have a rest