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题型：单选题题类：真题难易度：普通

The real reason why prices ____ , and still are, too high is complex, and no short discussion can satisfactorily explain this problem.

A、were B、will be C、have been D、had been

举一反三

Mark Zuckerberg is the founder of the site Facebook, ______ you can have a
look at each other's pictures.

—Why did you leave that position?

—I ________ a better position at IBM.

Jenifer {#blank#}1{#/blank#}(钦佩) his talent and decided to work for him.

When asked whether the information on the Internet is true or false, they were not sure.

Her actions c{#blank#}1{#/blank#}(形成对比) sharply with her promises.

You think it's helpful to put children in a situation ________ they can see themselves differently, and this is ________ I agree.

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