As nobody here knows what is wrong with the machine, we send for an engineer to handle the problem．
#63675
A
should
B
must
C
can
D
would
推荐题目
-----Someone is knocking at the door.It ____ be Tom .-----No, it ______ be him ;he has gone to Sydney.
#63094
A
must, can’t
B
might, mustn’t
C
may, needn’t
D
can, mustn’t
Thanks to his pension, Li Zhentian, _____ give each of his grandchildren RMB 5 as a Chinese New year gift for the first time.
#62165
A
had to
B
was able to
C
would
D
could
You may get lost easily in big cities like Beijing you have a map or a guide.
#77382
A
unless
B
if
C
when
D
until
--Why are your eyes so red? You _______ have slept well last night.
#62776
A
can't
B
mustn't
C
needn't
D
won't