Today, we _____ work as hard as people did in the past.
#76507
A
mustn’t
B
can’t
C
shouldn’t
D
don’t have to
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Doctor Wang      at seven o’clock for the conference, but she didn’t turn up. 
#62827
A
should have arrived
B
should arrive
C
should be arrived
D
should be arriving
One ought ________ for what one hasn't done.
#62937
A
not to be punished
B
to not be puished
C
to not punish
D
not be punished