He won't finish doing the exercises in time he isn't a diligent student. A. unle
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He won't finish doing the exercises in time he isn't a diligent student.
A.unlessB. becauseC. even D.though
试题答案
答案：B
解析：| 因为他不是一个聪明的学生，所以他不能按时完成练习。
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