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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.

—_________ your mother free at the weekend?

—NO. She ________ has much work to do.

Before you quit your job, do consider how your family would feel about your decision ______?

I suppose someone must have broken into the lab yesterday, ?

—I spend two weeks in Beijing last year.

—Then you must have visited the Great Wall during your stay, ________ you?

Who ________ for the US government shutdown after President Donald Trump and the US Congress failed to pass the bill to extend federal funding?

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