【題目】Unless the weather , we will have to cancel the game.

A.improvesB.improvedC.is improvingD.will improve

【答案】A

【解析】

句意:除非天氣改善,否則我們將不得不推遲比賽。

unless引導(dǎo)條件狀語從句,主句為一般將來時(shí)態(tài),根據(jù)“主將從現(xiàn)”的原則,可知從句用一般現(xiàn)在時(shí)態(tài),從句主語the weather不可數(shù)名詞,謂語動(dòng)詞用單數(shù)形式;improves動(dòng)詞單數(shù),improved 過去式,is improving現(xiàn)在進(jìn)行時(shí)態(tài)的結(jié)構(gòu),will improve一般將來時(shí)態(tài)的結(jié)構(gòu);故選A。

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