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题型：单选题题类：真题难易度：困难

The exhibition tells us ______ we should do something to stop air pollution.

A、where B、why C、what D、which

举一反三

In a meeting, Xi Jinping shared a story on his parents passed down important moral values to him.

You can only be sure of ___ you have at present; you cannot be sure of something ___ you might get in the future.

________ you have picked up, you must give it back to ________ it belongs to.

I just don't understand ________ that prevents so many Americans from being as happy as one might expect.

To tell you the truth, I could imagine ___ you felt at the disappointing result.

人们需要时间来思考这些变化对他们意味着什么。(think)

People need time {#blank#}1{#/blank#}the changes will mean for them.

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