He spoke as though he________ anything of the world. --Really?
#86457
A
knew
B
had known
C
knows
D
has know
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—What a pity! Their experiment is a failure.—They ________ better under more favorable conditions.
#86419
A
should have done
B
could have done
C
must have done
D
may have done
I think that's unlikely to happen, but if that_______, both America's and China's interest would be severely damaged.
#86812
A
should occur
B
occurs
C
had occurred
D
is going to occur
To be on the safe side, we should fill up the tank now, because we ______ run out of gas on the way.
#89113
A
could
B
might
C
would
D
must
Luckily some friends living locally came to visit me regularly and I went home every weekend, or I________mad.
#86611
A
was going
B
would have gone
C
would go
D
had gone
It’ s suggested by experts that teenagers ____at least 30 minutes exercising, five times a week.
#87174
A
spend
B
to spend
C
spent
D
have spent