Water, air and sunshine are __________great importance ____living things．
#48233
A
in; on
B
in; to
C
of; on
D
of; to
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--It’s clever _____ you to help me work out this difficult maths problem. Thanks.--- You are welcome. Now it’s easier ______ you to understand it.
#47375
A
of; of
B
of; for
C
for; of
D
for; for