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题型：单选题题类：常考题难易度：普通

现在进行时——表示反复出现的习惯性动作

He _______ continually _______ about how to solve the problem.

A、/; think B、are; thinking C、is; thinking D、am; thinking

举一反三

–You're in a hurry. Where are you going?—To the library. Tony for me there.

Look at the photo! Lisa ________.

Kangkang is __________ TV.

More and more foreign students begin to learn Chinese, and many of them _____Chinese better and better now.

Look! These workers are{#blank#}1{#/blank#}(加工)the tea.

Mr. Lee {#blank#}1{#/blank#} {#blank#}2{#/blank#}.

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