在一个自然生态系统中，为了利于被捕食者(如羊)种群的生存，最好将其捕食者(如狼)全部消灭。（）
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The writer of this article
A. believes Uganda's situation will ultimately improve.
B. thinks that developed countries do not help Uganda enough.
C. is optimistic about the future in general.
D. is sympathetic to poorer countries.
The main purpose of the passage is to______.
A. compare skyscrapers with other modem structures
B. describe skyscrapers and their effect on the environment
C. advocate the use of masonry(化妆舞会)in the construction of skyscrapers
D. illustrate some architectural designs of skyscrapers
A．onB．towardC．forD．in
A. on
B. toward
C. for
D. in
A．each oneB．each otherC．the otherD．one other
A. each one
B. each other
C. the other
D. one other
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