Which of the following statements is NOT true？
A. Scientists help control the natural density of caterpillar host-plants.
B. Scientists know almost all of the crops for butterfly ranching and farming.
C. Scientists are engaged in the study of finding unknown host-plants.
D. Scientists observe carefully the egg-laying female butterflies.
查看答案
In Line 6 Para. 2, "this" refers to ______ .
A. the expatriates came to collect insects in the rainforest neighborhood
B. the government developed a pioneering project
C. the expatriates involved in commercial exploitation of the insects
D. the expatriates made profit from commercial exploitation with the aid of rainforest habitats
Thanks to the popularity of the book, Stowe received ______ .
A. pirated editions
B. great reputation only in the USA
C. patent for both American and pirated editions
D. patent for only the American editions
The best title for this passage is ______ .
A. The Birth of a New Nation
B. The Discovery of Gold
C. Austrlia's Political System
D. Gold Rush in Australia
【C8】
A. be in the control of
B. be in control of
C. change
D. confront
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