7．up　考查副词。根据语境“but”可知，说话人虽然知道吸烟不好，但是从来没有想过戒烟。且根据固定短语搭配：give up意为“放弃”，符合语境。故用副词up。

　　8．who/that　考查定语从句。分析句子题干可知，此句是一个定语从句，所填词在从句中作主语，修饰先行词“people”，故用关系代词who/that引导的定语从句，符合语境。

　　9．difference　考查名词。冠词修饰名词。故此处用different的名词形式difference。

　　10．late　考查形容词。根据语境可知，此处表示十年后再意识到吸烟的危害性就为时已晚。故用形容词late。

　　Ⅳ.短文改错

　　(2017·新课标Ⅰ)

　　Nearly five years before, and with the help by our father, my sister and I planted some cherry tomatoes (圣女果) in our back garden. Since then—for all these year—we had been allowing tomatoes to self­seed where they please. As result, the plants are growing somewhere. The fruits are small in size, but juicy and taste. There are so much that we often share them with our neighbors. Although we allow tomato plants to grow in the same place year after year, but we have never had any disease or insect attack problems. We are growing wonderfully tomatoes at no cost!

　　答案：

　　Nearly five years ， and with the help

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