【題目】Traffic accidents have caused many deaths in the past few years. more action is taken,the problem will get even worse.

A. Unless B. If C. After D. When

【答案】A

【解析】句意:在過去的幾年中,交通事故已經(jīng)導致了許多人死亡。除非采取措施,這個問題將變得更糟。Unless除非;if如果;after……之后;when…..時候;結(jié)合句意,表示不采取行動,問題會更嚴重,故用連詞unless,故選A。

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