单项选择题
W: Why didn’t you come here yesterday, John M: I’m sorry, sir. My mother was ill.
A．John was expected to come yesterday. B．John didn’t come because he was ill. C．The man was John’s father.
A．The student can’t leave unless he has put everything back in the cupboard. B．The student can leave after he turns off the electricity. C．The student can leave after he has tidied the lab.
A．In a restaurant. B．On a farm. C．At the man’s home.