What can we infer from the tragic example given in the first paragraph? Which statement is TRUE according to the passage?

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问题 What can we infer from the tragic example given in the first paragraph?
Which statement is TRUE according to the passage?

选项 A、The Thames has not been saved from pollution yet.
B、The condition of the Thames was at worst in the 1950s.
C、Few people are concerned about the pollution problems of the Thames.
D、No one is certain what the main cause for the pollution of the Thames is.

答案B

解析 细节题。由文章第一段前两句、第三段第一句可知,泰晤士河污染最严重的时期是在20世纪50年代。
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