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题型：单选题题类：模拟题难易度：普通

I have some _________ in working out the problem.

A、difficulty B、difficulties C、troubles D、difficult

举一反三

China does a lot of {#blank#}1{#/blank#} (贸易) with many countries.

Half of the people agree with me, that means, fifty p {#blank#}1{#/blank#} say yes.

My uncle needs a lot of m{#blank#}1{#/blank#} to buy a big house.

Sally can speak ____ well, but she isn't from ____.

{#blank#}1{#/blank#} some water in the cup. （have/there be）

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