74．If someone comes to see me，ask him to leave a_________（信息，消息）．

73．He put the letter in an_________（信封）and then put it into the mail box．

72．Let's make a_________（决定）who can go to Beijing with the officer．

71．My friend always plays his CDs too_________（大声）．

70．My English teacher will work in Gansu for two years as a v_________．

69．She is the smartest student in her class．She often has o_________ ideas．

68．I think I am going to the movies t_________ because I don't have homework．

67．Don't be n_________．You should relax yourself．

66．She said she was having a s_________ party for Lana on Friday．