Some developed countries are trying to the serious problems resulting from the energy crisi——青夏教育精英家教网—

摘要： Some developed countries are trying to the serious problems resulting from the energy crisis. A. step up B. cope with C. cut off D. end up

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Some developed countries are trying to ____ the serious problems resulting from the energy crisis.

A. step up　 B. cope with　 C. cut off D. end up

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