7. A common way to produce x-rays is ________ electrons into a copper target.
A. fires
B. fired
C. by firing
D. how to fire 错误
simplifying the sentence: .... way to ... is ..... thus, only C is correct.
8. Chaparral consists of _____ stunted by short, wet winters followed by long, dry summers.
A. are trees and shrubs
B. how trees and shrubs
C. trees and shrubs have 错误
D. trees and shrubs (正确).
we need nouns after "of". the whole sentence is: C consists of tress and shurbs (which are) stunted by short, wet winters (which are) followed by long, dry summers
12. During the second and third years of life, children gain _______ over their bodies.
A. control increasing -------- A is equal to "control that increases", so it's wrong
B. increasing to control 错误
C. control is increasing
D. increasing control 正确
上面几道题红色的就是正确的答案...可是我想不明白为什么要选红色的这些.
we need a noun in this blank. thus, D is correct.
3-3
3. It seems probable that prehistoric people who discovered, by trial and error, which plants were
A B
poisonous and which had some medicinal value.
C D
选C是错误的.
为什么选B?
no main verb in "that" clause, thus, who dicovered ------> was discovered. the whole sentence is : "it seems .. that .. people was discovered, by...,"
4. Developed from the medieval mandola, the modern mandolin has four pairs of string tuned to
A B
violin pitch and produces a clear, bright tone.
C D
选C是错误的
为什么选B? four pairs of string -------> four pairs of strings C is correct, which is paralle to "has". "...mandolin has ...and produces a ..."
8. Oak trees furnish more timber annually in the United States than any of other broad-leaved tree
A B
and are second only to conifers in total lumber production.
C D
选C是错误的.
为什么要选B? any of other BL tree ------> any other tree. however, any of the other BL trees would be correct, too.
15. The Andromeda galaxy, like the Milky Way, is orbited by several companion galaxies but
A B C
contains about as twice many stars.
D
选C是错误的. 为什么选D "twice as .....as " is correct. thus, as twice many stars ----> twice as many as stars
16. In art, caricature is a pictorial representation which the physical features of a person or object
A B C
have been grossly exaggerated for comic effect.
D
选C是错误的. 为什么要选A? A ------> representation by which . the pattern is: noun + prep. + which + subject + verb + object
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发表于 2006-3-10 15:19:00
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