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 來源： 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 來源： 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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