Doing your homework is a sure way to improve your test scores, and this is especially true ______it comes to classroom tests.

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问题 Doing your homework is a sure way to improve your test scores, and this is especially true ______it comes to classroom tests.

选项 A、when
B、since
C、before
D、after

答案A

解析 when it comets to 是习惯用语,意为“当涉及……时,当谈到……时”。
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