单项选择题
The passage tells us that （）
A．Americans are forced to be efficient against their will B．Americans should do what they are willing to do C．people ought not to work so hard for efficiency D．Americans are at a loss what to do
单项选择题 30（）
单项选择题 The phrase that best expresses the main idea of this passage is （）
单项选择题 The word "sluggard" means（）
