-Mr. Hu,can you tell us how to learn math well? -Sure. But remember nothing can be learned ________hard work.
A. by
B. at
C. without
D. for
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-Your coat looks very nice. What's it made________? -Cotton,and it is made ________Wuhan.
A. from;in
B. of;in
C. from;on
D. of;on
It's very friendly ________him to help me when I'm in trouble.
A. for
B. to
C. of
D. with
He had to retire early ________poor health.
A. as a result
B. because
C. so
D. because of
It's time ________the weather report. Turn on the radio,please.
A. to
B. in
C. at
D. for