问题描述：
关于一个英语句子.有哪些语法点、知识点?
Keep looking ahead so that you can give the driver lots of warning before having to make a turn,or you 'll have to move to the back seat.这一句话.
Keep looking ahead so that you can give the driver lots of warning before having to make a turn,or you 'll have to move to the back seat.这一句话.
问题解答：
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