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20. Consumers may not think of household cleaning products to be hazardous substances，but many of them can be harmful to health，especially if they are used improperly． (A) Consumers may not think of household cleaning products to be (B) Consumers may not think of household cleaning products being (C) A consumer may not think of their household cleaning products being (D) A consumer may not think of household cleaning products as (E) Household cleaning products may not be thought of by consumers，as
答案是D，想问如果把D的a consumer换成consumers可不可以？
22．In recent years cattle breeders have increasingly used crossbreeding，in part that their steers should acquire certain characteristics and partly because crossbreeding is said to provide hybrid vigor. (A) in part that their steers should acquire certain characteristics (B) in part for the acquisition of certain characteristics in their steers (C) partly because of their steers acquiring certain characteristics (D) partly because certain characteristics should be acquired by their steers (E) partly to acquire certain characteristics in their steers 答案是E，请问：如果把D改成partly because their steers should acquire certain characteristics.可不可以？
27．Minnesota is the only one of the contiguous forty-eight states that still has a sizable wolf population, and where this predator remains the archenemy of cattle and sheep． (A) that still has a sizable wolf population，and where (B) that still has a sizable wolf population，where (C) that still has a sizable population of wolves，and where (D) where the population of wolves is still sizable； (E) where there is still a sizable population of wolves and where 答案是E，请问：前面有the only，后面不是要用that来引导吗？这一句中用where又是什么原因呢？ 谢谢！
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发表于 2007-1-6 15:59:00
