单项选择题
A. that people feel very emotional B. that parents worry their children at school C. that these children think education is a waste of time D. that there are not enough police to pick up truants on the streets
A. increases the ability to think B. is the best time for thinking C. is better for thinking than is very warm weather D. decreases the ability to think
A. the weather; B. the history C. geography D. the names