请先看两个例子 大全164. Because natural gas is composed mostly of methane, a simple hydrocarbon, vehicles powered by natural gas emit less of certain pollutants than the burning of gasoline or diesel fuel. (A) less of certain pollutants than the burning of gasoline or diesel fuel (B) fewer of certain pollutants than burning gasoline or diesel fuel do (C) less of certain pollutants than gasoline or diesel fuel (D) fewer of certain pollutants than does burning gasoline or diesel fuel(E) (E) less of certain pollutants than those burning gasoline or diesel fuel 大全333. Houseflies that hatch in summer live only about three weeks, but those that emerge in the cooler days of fall often live longer than six months. (A) weeks, but those that emerge in the cooler days of fall often live (B) weeks, but those that emerge in the cooler days of fall often live as long or (C) weeks, which is different from those that emerge in the cooler days of fall and often live (D) weeks; then those that emerge in the cooler days of fall often live as long as or(A) (E) weeks; this is different from those that emerge in the cooler days of fall, who often live 从这两个例子可以看出,如果用those作为代词来直接替代复数名词,those其实是指代是核心词,164中的vehicles,333中的houseflies,而且该种用法常常用在比较结构中. 而在本题中those是作为形容词出现的,those修饰mothers,因此those mothers就是前面出现的mothers with young children working outside the home in 1975(选项A,B)
[此贴子已经被作者于2007-2-25 13:54:05编辑过] |