单项选择题

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
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单项选择题
The ______ tales between China and Japan were the base of the later agreement.
A. initial
B. primitive
C. fundamental
D. terminal
单项选择题
We rarely perceive more than a minute ______ of the sights and sounds that fall upon our sense organs; the great majority pass us by.
A. fiction
B. function
C. fraction
D. friction
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