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. The global warming is going to be a big problem and many people are wondering

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. The global warming is going to be a big problem and many people are wondering

.

 The global warming is going to be a big problem and many people are wondering ________ we can do with it.

  A. if              B. how          C. that          D. what

试题答案

D

标签：bigbeproblemmanyand

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