摘要： -------The weather is terrible now; our earth is badly damaged! -------Yes. It’s urgent that everyone spare no effort to do something to save our world . A. must B. would C. should D. shall
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-------The weather is terrible now; our earth is badly damaged!
-------Yes. It’s urgent that everyone _________ spare no effort to do something to save our world .
A. must B. would C. should D. shall
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