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题型：单选题题类：常考题难易度：普通

—They started working on the show two months ago, didn't they?
—___________. A lot of work needed to be finished before the show.

A、Yes, they did B、No, they didn't C、Yes, they didn't D、No, they did

举一反三

Sally has few friends here, ?

My brother's never been late for school up till now, ________?

——Your mother's never seen a 3D film at the cinema, has she?
—— ____, but only once.

He's still not understood by his close friend although he has said sorry to him, _________?

We've been good friends ever since, _______?

John's never flown to Canada, _______?

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