The students have made a request that the reading-room __ open on Sunday afternoon.
#87212
A
stay
B
stays
C
must stay
D
will stay
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As a graducate in computer science, he ___ to work out the problem.
#89044
A
wouldn't have failed
B
can't have failed
C
mustn’t have failed
D
might not have failed
We were delayed at the airport.Otherwise,we    here by lunch.
#86444
A
must have been
B
could be
C
should be
D
would have been
Without the air to hold some of the sun’s heat,the earth at night   .
#88970
A
would be freezing cold
B
will be freezing coldly
C
would be frozen cold
D
can freeze coldly