The findings of the research, _________ on a lot of experiments, are convincing.
#96102
A
to base
B
based
C
is based
D
basing
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I hope______the child some sweets can make him stop crying.
#93260
A
giving
B
give
C
you to give
D
you’ll give
We don’t allow ____ in the office. But you are allowed ______ in the open air. 
#96186
A
smoking; smoking
B
to smoke; to smoke
C
smoking; to smoke
D
smoke; smoking