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When about one of the biggest problems today, many experts say that an energy cr

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When about one of the biggest problems today, many experts say that an energy cr

When       about one of the biggest problems today, many experts say that an energy crisis is approaching and is thus threatening mankind's survival．

       A．asked      B．being asked     C．having asked    D．asking

试题答案

A

标签：expertsmanytodayanthat

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