G-4：get ahead with 使……有进展
A:I'm going to play basketball this afternoon.
A:我今天下午去打篮球。
B:I think you had better not.
B:你最好别去。
A:Why?
A:为什么？
B:We'll get ahead with a new lesson this afternoon.
B：我们今天下午要进行新课。
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