The researchers had their entire test pool complete Reading Span Tasks to get a baseline reading.Then they moved some of the people to a room with no plants，and others to a room that had four plants around the desk.They were all asked to repeat the Reading Span Tasks，and the people who worked near a plant improved overall，while those without plants stayed roughly the same.

　　Beauty，fresh air，the joy of caring for another living thing－all great reasons to have a few houseplants around.If they help increase attention spans，all the better!

　　1．The study shows that growing houseplants can ________．

　　A．clean the air

　　B．make the house beautiful

　　C．increase attention spans

　　D．have the joy of caring

　　【解析】　细节理解题。由第二段第一句话可知答案。

　　【答案】　C

　　2．The underlined word in the second paragraph probably means ________．

　　A．ideasB．research

　　C．theories

　　D．experiments

　　【解析】　词义理解题。由调查研究得出一个“想法”，然后验证这个“想法”。

　　【答案】　A

　　3．In the last paragraph，the writer ________．

　　A．places an advertisement

　　B．comments on the study

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