27. (A) In time (B) On time (C) About time (D) Over time

31.Which title best reflects the main idea of this article? (A) The Effects of Different Measures in Dealing with the Issue of Birth Rates (B) The Significance of the Issue of Lacking Social Support in Having Children (C) The Issue of Low Birth Rates and Strategies Adopted by Different Countries (D) The Importance of Promoting Birth Rates in the Modern Society