【題目】If he doesn't study hard, he will fall behind others. (保持句意基本不變)

He will fall behind others ________ he ________ hard

【答案】unless studies

【解析】

句意:如果他不努力學習,他就會落后于別人。

此題為同義句轉換,也可以說“除非他努力學習,否則就會落后于別人”,用unless除非;從句主語he是第三人稱單數(shù),study要變成studies。故答案為unlessstudies。

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