40.　 ---I’m going to Shanghai this afternoon.　 ---________. Then how soon will you come back?

A. Have a nice trip　　　　　 B. Congratulations　 C. Cheers　　　　 　　　 D. Good luck

39.　 The _____ look on his face showed that he had enough confidence in himself.

　 A. surprising　　 　　　　B. puzzled　　 　　　C. exciting　　 　　D. determined