题目内容
(请给出正确答案)
[主观题]
The author's main purpose in writing the last paragraph of the passage was to______.A.expl
The author's main purpose in writing the last paragraph of the passage was to______.
A.explain how cold viruses are transmitted
B.prove that a poor diet causes colds
C.discuss the relationship between income and frequency of colds
D.analyze the distribution of income among the people in the study
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