题目内容
（请给出正确答案）
提问人：网友l******8
发布时间：2022年3月20日 19:29
[单项选择题]
In general terms, the greenhouse effect, which has been studied with wary and keen interest for as l...After reading the passage, we may conclude ______.
A．the author is worried about the greenhouse effect
B．the author asks all of us to reduce the use of coal
C．the greenhouse effect is welcome as it is a mixed blessing
D．the greenhouse effect has affected our life now
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