If anything         the machine, please let us know.
#56888
A
happens on
B
happens to
C
happened on
D
will happen to
推荐题目
This is David’s postcard, please_____.
#59178
A
give it back to him
B
give back it him
C
give him back to it
D
get him back to it
Please ____________your rackets __________ your desk. 
#61744
A
take, on
B
put, on
C
show, in
D
bring, to
--- Is your father in?--- No, he ______ for three hours.
#58838
A
was out
B
has been out
C
went out
D
has gone out
Why not________ to the city?
#53988
A
go
B
to go
C
going
D
went