单项选择题
Why is the government asking for comments on the new rules（）
A. Because it is trying to fool people. B. Because it doesn’t know how to make rules. C. Because it wants to be nice. D. Because it wants to hear what the citizens have to say.
单项选择题 21()
单项选择题 What will happen to residents if they don’t comply with the law（）
单项选择题 According to the passage, a barter economy can lead to （）
