单项选择题
A. wonder what to do in the future B. pay no attention to the UN’s call C. take no measure in conservation D. should act quickly to answer the UN’s call
A. their brains could not function efficiently any more B. the full development of both sides of their brain was achieved C. their bodies stopped working D. they were very old
A. What jobs are available to support families. B. How people can save more money. C. How to get a good deal on a new car. D. What kinds of houses they should buy.