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【題目】Iceland will completely disappear in the world if we ________ nothing to the environment.

A.doB.didC.have doneD.will do

【答案】A

【解析】

句意:如果我們不為環(huán)境做些什么,冰島將完全在世界上消失。

考查時態(tài)辨析。do意為。if引導的條件狀語從句遵循主將從現原則,主句用一般將來時,從句要用一般現在時表將來。故選A。

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