People love the convenience of bottled water, but if they ________ the problem it causes, they ________ try carrying water in a reusable steel container instead of plastic.

A．realized; will B．had realized; will

C．realized; would D．have realized; would

 

C

【解析】C 考察虛擬語氣。句義：人們喜歡瓶裝水的便利，但如果他們意識到瓶裝水會導致的問題，他們就會使用可循環(huán)的鐵罐代替塑料瓶來裝水。If虛擬句表示對現(xiàn)在的虛擬假設。故C正確。

 

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