戴夫是个好孩子,他总是按时完成作业。
Dave is a good boy and he always finishes doing his homework on time.
作为一名学生,你应该按时完成作业。
第二,每天按时完成作业,认真听讲。
Second, complete the work on time every day, listen carefully.
So, I ask you to do the problems as and when they're posted.
所以,我要求你们按时按量地完成作业
So come to two lectures, one section, and do the work regularly.
下面要完成两个课时,一个课外讨论,按时完成作业
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