—I'm busy with my schoolwork these days.—That's great！You won't get good grades

题干

—I'm busy with my schoolwork these days.
—That's great！You won't get good grades ________ you study hard.

A．until

B．because

C．unless

D．though

上一题下一题 0.4难度单选题更新时间:2019-01-15 09:46:45

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