5. Because of its importance in modern living, _________in all parts of the world.
(A) algebra is studies in schools and colleges
(B) studying algebra in schools and colleges
(C) and the study of algebra in schools and colleges
(D) in schools and colleges are algebra studies
选A。该句逗号前是介词短语做因果状语,后面题干部分缺少主谓。选项中只有A和D做存在主谓结构。请注意因果状语重的its,这代表在本句中必须出现作为单数名词成分,可以是主语宾语等等。A中的algebra是单数主语,没有问题;而D中的studies是复数,而且也没有其他的单数名词;而algebra是作为名词性形容词出现的,所以D不行。
30. The cotton mills of a hundred years ago were hot, dust, noisy, dangerous places and the life of the mill workers was hard.
选择B。简单的形容词并列结构。应该是hot, dusty, noisy, dangerous places.
39. The oriental fruit fly causes extensive damage to grapefruit, lemons, and oranges but does not harm to the trees on which the fruit grows.
选择B。除了固定搭配do harm to之外,harm也可以做动词,但是必须是及物的,比如harm sth.. 所以还是B错。
[此贴子已经被作者于2004-8-27 19:05:27编辑过] |