单项选择题
A. Just in case someone asks. B. Scientists like to take tests. C. Scientists are not very busy. D. To keep track of pollution levels.
A. It said so in the newspaper. B. Some people don’t believe it. C. The governor sent out a press release. D. A group of people studied the costs of raising a family.
A. many suicides love blue color B. the color of sky and see may calm excited people C. only people with trouble in mind need blue color D. blue color will definitely work to save suicides