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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When it grows ________, it will grow ________ a strong animal.
#48404
A
up; up
B
up; into
C
into; into
D
into; with
Keys _______ opening the lock in the door.
#47057
A
used for
B
are used
C
are used to
D
are used for