问题
选择题
It is the usual ________ in our school that if you spoil any material, you'll have to pay for it. [ ]
A. order
B. argument
C. opinion
D. practice
答案
答案：D
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It is the usual ________ in our school that if you spoil any material, you'll have to pay for it. [ ]
A. order
B. argument
C. opinion
D. practice
答案：D