问题
选择题
Doing your homework is a sure way to improve your test scores and this is especially true _____ it comes to classroom tests. [ ]
A. when
B. since
C. before
D. after
答案
答案：A
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Doing your homework is a sure way to improve your test scores and this is especially true _____ it comes to classroom tests. [ ]
A. when
B. since
C. before
D. after
答案：A
