To buy a ticket,you ___line up at this window(must mustn't与have to选一)急!

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To buy a ticket,you ___line up at this window(must mustn't与have to选一)急!
To buy a ticket,you ___line up at this window(must mustn't与have to选一)急!

To buy a ticket,you ___line up at this window(must mustn't与have to选一)急!
have to

选have to
意思是:要买票的话,你不得不在这窗口排队。
must 表主观的必需,也就是说主语有这方面的需要
比如:We must find a good method to learn English.
have to 表客观必需,也就是说迫于外部的压力
比如:I have to look after my little sister because...

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选have to
意思是:要买票的话,你不得不在这窗口排队。
must 表主观的必需,也就是说主语有这方面的需要
比如:We must find a good method to learn English.
have to 表客观必需,也就是说迫于外部的压力
比如:I have to look after my little sister because mom is out.

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