单项选择题
The phrase that best expresses the main idea of this passage is （）
A．the modern pace B．our interest in shortened operas C．how to make the best use of leisure time D．planning our time scientifically
单项选择题 30（）
单项选择题 The word "sluggard" means（）
单项选择题 The "pleasant day" to which the author refers was the period when we（）
