问题
选择题
Don't throw litter ______. You must give ______ your bad habit. [ ]
A. up; in
B. about; up
C. on; up
D. about; on
答案
答案：B
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Don't throw litter ______. You must give ______ your bad habit. [ ]
A. up; in
B. about; up
C. on; up
D. about; on
答案：B
