题目内容
5．These days，the environment in Beijing is much worse than in Hefei．（ ）| A． | one | B． | it | C． | that | D． | Those |
分析 目前，北京的环境要比合肥的环境差多了．
解答 答案：C； one用于泛指前面提到过的名词；it指前面提到过的问题本身；that特指前面提到的名词，that和被代替的名词并非指同一事物，而是同类事物．多用于事物的比较，避免重复；those指代前面提到的复数可数名词；根据句中信息These days，the environment in Beijing is much worse than（ ）in Hefei．可知空里单词指代前面的environment；特指合肥的环境；故选C．
点评 根据语境，细读选项，认真分析选项之间的异同，选择正确的答案．
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