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题型：单选题题类：常考题难易度：普通

This is the first time that your parents have been abroad, ______?

A、haven't they B、hasn't it C、aren't they D、isn't it

举一反三

Carl looks sad these days，but we don't know________is bothering him.

{#blank#}1{#/blank#} the football game that they kept shouting at the top of their voices? (while)

是在看足球比赛时他们扯大嗓门不停叫喊的吗？

I told them not everybody could run as fast as you did, ________?

I don't think he is right, ______?

—_________ your mother free at the weekend?

—NO. She ________ has much work to do.

go for a holiday?

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