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
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