50. He didn't tell me _________.

　　 A. when he will return　　　　　 B. where had he been

　　 C. how he got there　　　　　　 D. whether he did visit his relatives

49. Which torch of the below is for 2008 Beijing Olympic Games?

48. Mr Green went to Shenzhen on business last week, _________ ?

　　 A. isn't he　　　 B. doesn't he　　　 C. didn't he　　　 D. hasn't he