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Doingyourhomeworkisasurewaytoimproveyourtestscoresandthisisespeciallytrueitcomestotheclassroomtests.A.beforeB.asC.since

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Doing your homework is a sure way to improve your test scores and this is especially true______ it comes to the classroom tests.

A. before                 B. as                         C. since                     D. when

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D