单项选择题
It is implied in the passage that （）
A．mothers have the practice to go to work B．working mothers have no time to stay with their children at home C．mother’s position in a family has been raised D．young wage-earners are economically independent
单项选择题 The writer compares home to a workshop because （）
单项选择题 28（）
单项选择题 According to this passage, the umbrella was probably first invented（）
