It is essential that these application forms ______ back as early as possible.
#87599
A
must be sent
B
will be sent
C
are sent
D
be sent
推荐题目
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