【題目】If nothing ______, the oceans will turn into fish deserts.

A.is doneB.has doneC.will be doneD.does

【答案】A

【解析】

考查動(dòng)詞時(shí)態(tài)語(yǔ)態(tài)和主謂一致。句意:如果不采取措施,海洋將變成魚類沙漠。從句中主語(yǔ)與謂語(yǔ)動(dòng)詞構(gòu)成被動(dòng)關(guān)系,且主句為一般將來(lái)時(shí),則條件狀語(yǔ)從句中需用一般現(xiàn)在時(shí)表將來(lái)時(shí),且主語(yǔ)為nothing,謂語(yǔ)動(dòng)詞應(yīng)用第三人稱單數(shù)is。故選A。

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