some of them are busy (上) lessonssome are busy 训练 with the school soccer team

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some of them are busy (上) lessonssome are busy 训练 with the school soccer team

some of them are busy (上) lessonssome are busy 训练 with the school soccer team
some of them are busy (上) lessons
some are busy 训练 with the school soccer team

some of them are busy (上) lessonssome are busy 训练 with the school soccer team
1 having
2 training
be busy doing sth 忙于做某事.

为你解答。
1、Some of them are busy (having) lessons. 2、Some are busy (training) with the school soccer team.
其中一些人在忙着上课。一些在忙着和校足球队一起训练。
解释:be busy doing,忙于做某事。要填动词的doing形式。