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The world’s elderly population will exceed(超过) ____ of children by 2060,when each group ____ to account for about one fifth of the population.
A.that; expectsB.those ; will expect
C.that ; is expectedD.one ; will be expected
C

试题分析:考查代词和时态语态:第一空填that指代population,第二空填is expected因为each group和expect是被动关系,句意:世界老年人口到2060年将超过儿童的人口,那时每个群体将占据人口的5分之一。选C。
点评:代词辨析要弄清指代的是什么:It指代上文出现的同一事物;that指代可数名词单数或者不可数名词,后面一定要有定语修饰;one表示泛指,指代可数名词单数。
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