It was Mr Zhang that helped us out of the trouble. Without his help, we ______ it so easily.A.can’t manageB.mustn’t have managedC.couldn’t have managedD.couldn’t manage
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C解析本题考查含蓄虚拟语气。根据It was Mr Zhang that helped us out of the trouble可知是和过去事实相反，Without his help，为含蓄虚拟条件，主句谓语应用couldn’t + have done 结构，所以选C。