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22、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．a(chǎn)sked          B．being asked          C．having asked         D．a(chǎn)sking

22、A

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科目：高中英語(yǔ) 來(lái)源： 題型：

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．a(chǎn)sked      B．being asked     C．having asked    D．a(chǎn)sking

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科目：高中英語(yǔ) 來(lái)源： 題型：

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．a(chǎn)sked          B．being asked          C．having asked         D．a(chǎn)sking

查看答案和解析>>


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