The time he has devoted in the past years __________ the disabled is now consideredto be __________ great value __________ him.
#45963
A
to help; of; for
B
to helping; /; to
C
to help; in; of
D
to helping; of; to
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—_____do you improve your listening? —I improve it ______ listening to tapes.
#50028
A
How; with
B
What; with
C
How; by
D
What; by
--When will Mr. Black come to Beijing? --________ the morning of September 5th.
#50839
A
In
B
On
C
At
D
For