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preparing his lessons

preparing his lessons

preparing his lessons

preparing his lessons

1

My teacher was preparing his lessons when I knocked at the door .

当我敲门时，老师在备课。

2

He devotes all his time and energy to teaching , often working late into the night preparing his lessons.

他把所有的时间精力都投入到教学中，经常备课到深夜。

3

Our English teacher often stays up preparing his lessons .

我们的英语老师经常熬夜备课。

4

He doesn't spend much time preparing his lessons .

他备课不花太多时间。

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