A. off
B.up
C. down
D. in
第1题
A. towards
B.on
C. against
D. for
第2题
A. To play
B.Play
C. Played
D. Playing
第3题
A. held
B.prevented
C. helped
D. kepted
第4题
A. would play
B.play
C. to play
D. used play
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