C.they require little care from the local gardener

　　D.they are more used to the local growing conditions

　　答案　D

　　解析　细节理解题。根据第五段第一句话“Native plants are recommended for rain gardens because they are more used to the local climate，soil，and water conditions.”可知，建议种本地的植物是因为本地的植物更适应本地的环境。

　　4.What do we know about rain gardens?

　　A.They need little water after all the plants are planted.

　　B.They may attract local birds and change the local climate.

　　C.They usually need at least an inch of rainwater a week.

　　D.They may reduce the water pollution problem by 70%.

　　答案　C

　　解析　细节理解题。由第五段第三句话“Water your rain garden immediately after planting and once a week，unless you have had at least an inch of rain during the week.”可知，雨水花园一周需要至少一英尺的雨水。故选C。

　　【健康环保类—阅读理解】（2015模拟题）

　　The fourth round of heavy smog that hit Beijing in four weeks has sent more people to the hospital with respiratory(呼吸的) illnesses and led to calls for laws to control the pollution.

　　Pan Shiyi，a real estate developer，said he is planning to propose(提出) a Clean Air Act to the local government.As a representative of the Beijing Municipal People’s Congress，he started an online survey at 9：20 am.Within three hours，more than 25,000 web users，or 99 percent of total respondents，welcomed his proposal on Sina Weibo，China’s Twitter.

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