单项选择题
A．Latchkey children feel free at home. B．Working parents often leave their children alone at home. C．Many parents do not admit that they leave their children alone. D．Latchkey children have to learn to take care of themselves.
A．an advertisement B．a textbook C．a news report D．an instruction (说明书)
A．It is important to be on time for class in the United States. B．The importance of being on time differs among cultures. C．People learn’ the importance of time from the culture they are in. D．Students being late for class should explain the reason to their teacher.