问题
选择题
Be careful, ________ you will fall ________ the bike. [ ]
A. and; off
B. but; down
C. or; off
D. so; from
答案
答案：C
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Be careful, ________ you will fall ________ the bike. [ ]
A. and; off
B. but; down
C. or; off
D. so; from
答案：C