According to the air traffic rules, you ___ switch off your mobile phone before boarding.
#87048
A
may
B
can
C
would
D
shall
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I ________ you how to deal with the matter, but why didn’t you ask me?
#86841
A
could show
B
were to show
C
had shown
D
would have shown
As she’s not here, I suppose she _____ home.
#89555
A
must go
B
must have gone
C
might go
D
might be going
This is his only request that the room_______ after being used.
#87382
A
be cleaned
B
would be cleaned
C
is cleaned
D
will be cleaned