单项选择题
Questions 11 to 13 are based on the following radio program "Science around Us". You now have 15 seconds to read Questions 11 to 13.
Why does Dr. Johnson suggest building a greenhouse near a power station（）
A．It is convenient to get electricity. B．It helps to clean the air. C．The exhaust from the plant can be made use of. D．The wasteland around the station can be made use of.
判断题 Women generally need less fiber than men.
