首先，我们在课堂上必须认真听课。

First of all we must listen carefully in class.

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关于学习，我们应该每天都完成作业，我们也必须认真听课。

About studying, must finish our homework every day and we we must listen to the teacher carefully in class.

youdao

关于学习，我们应该每天都完成作业，我们也必须认真听课。

About studying, we must finish our homework every day and we must listen to the teacher carefully in class.

youdao

关于学习，我们应该每天都完成作业，我们也必须认真听课。

About studying, we must finish our homework every day and we must listen to the teacher carefully in class.

youdao