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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、before        B、since  C、when D、after

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

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

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

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

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

A、before   B、since    C、when D、after

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

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