单项选择题
A．it is important to arrive at the appointed time B．it is rude for professors to be late for class C．it is normal for students to leave during lectures D．it is natural to keep the professor staying after class
A．Reading is just a way of knowing new words B．A good reader must learn more new words C．A good reader can think before, while and after reading D．Reading takes a lot of time
A．latchkey children enjoy having such a large amount of time alone B．latchkey children try to hide their feeling C．latchkey children often watch TV with their parents D．it’s difficult to find out how many latchkey children there are