【題目】If Mars no air or water, we will not survive there.

A. will have B. would have C. has D. is having

【答案】C

【解析】句意:如果火星沒有空氣和水,我們將在那里無法生存。If引導的是條件狀語從句,不能用一般將來時,而用一般現(xiàn)在時來代替。這里符合主將從現(xiàn)的原則,Mars是第三人稱單數(shù),所以用has,故選C。

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