求助：０２０８阅读

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26. According to paragraph 2, evidence from fossils suggests that
(A) extinction of species has occurred from time to time throughout Earth’s history.
(B) Extinctions on Earth have generally been massive
(C) there has been only one mass extinction in Earth’s history.
(D) dinosaurs became extinct much earlier than scientists originally believed.
B为什么不对啊？
29. In paragraph 3, the author makes which of the following statements about a species’ survival?
(A) It reflects the interrelationship of may species.
(B) It may depend on chance events.
(C) It does not vary greatly from species to species
(D) It is associated with astronomical conditions.
Ｃ呢？
38. The word “primarily” in line 19 is closest in meaning to
(A)        chiefly
(B)        originally
(C)        basically
(D)        clearly
两个版本的答案不一样啊．ａ　ｏｒ　ｂ
做题的时候，在两个答案之间犹豫的时候，总会选成错的，即便知道它正确的几率比较小，但还是选了。痛苦啊

[ Last edited by icanflyhighly on 2005-12-31 at 16:58 ]

icanflyhighlyUID: 2154694

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