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题型：单选题题类：常考题难易度：普通

Is Lucy ______ her homework?
No , she ________ .

A、do; doesn't B、does; isn't C、doing; is D、doing; isn't

举一反三

Where {#blank#}1{#/blank#} Mike {#blank#}2{#/blank#} (run) at the moment?

Frank _______ an interesting book about history at this time.

A dog is {#blank#}1{#/blank#} (跑) across the road.

他们现在正在游泳。

They {#blank#}1{#/blank#} {#blank#}2{#/blank#}now.

The students are {#blank#}1{#/blank#} / ˈtreɪnɪŋ / hard for next week's football match.

They are d{#blank#}1{#/blank#} some plans to protect the river in their village.

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