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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
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The light in his office is out. He_________ left for home.
#62358
A
must have
B
must have been
C
should have
D
should have been
Today’s work ____ today. Never leave it till tomorrow.
#78180
A
must do
B
must be done.
C
may be done
D
may do
--- Must I stay at home, Mum?--- No, you_____
#63171
A
needn’t
B
mustn’t
C
don’t
D
may not
— I am going to the dentist at 4 o'clock and it is 3：30 now.— Well, if you ______ leave earlier today, please ask the director for permission.
#63360
A
can
B
may
C
must
D
will
—It's no easy task to catch a ticket on a website that receives 1 billion clicks daily.—I can't agree with you more. There ________ be errors for every single step.
#62404
A
should
B
must
C
can
D
will