—— It is rather cold here. Shall we light a fire? —— No, we______because things are easy to catch fire. 
#89960
A
won’t
B
can’t
C
mustn’t
D
needn’t
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He ______ the key, so we ______ into the office.
#88113
A
hadn’t left; can’t
B
didn’t leave; couldn’t have got
C
hadn’t left; couldn’t get
D
hasn’t left; couldn’t get
I would rather you ____ it.
#87152
A
do
B
did
C
will do
D
would do
If you were to do it,the result______different. 
#87724
A
will be
B
would be
C
should be
D
would have been