单项选择题


A．source
B．origin
C．course
D．finance
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A．contestB．competitionC．racesD．choices
A．contest
B．competition
C．races
D．choices
单项选择题
The author's purpose in writing this article is to ______.
A．tell the reader not to rely only on statistics when dealing with the universe
B．encourage the reader to do some researches about the extraterrestrial life
C．tell the reader something about possible extraterrestrial life on other planets
D．show his interest in Aczel' s research in extraterrestrial life on other planets
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