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题型：单选题题类：常考题难易度：普通

——This problem is very difficult.

——I know,but Jack has working it out.

A、succeed in B、succeeds in C、succeeding in D、 succeeded in

举一反三

It's time to start the meeting, but the boss _____ yet.

— you out the rubbish yet?

— Yes. I it five minutes ago.

I ______ hard to improve my skills in the past three years.

I'd love to join you in the camping, but I've {#blank#}1{#/blank#}(允许)to go cycling with John.

It doesn't matter. I have{#blank#}1{#/blank#}(刚刚) arrived here.

She has got an English friend. (改为一般疑问句)

{#blank#}1{#/blank#} she {#blank#}2{#/blank#} an English friend?

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