第二部分: 书面表达
I. 根据所给单词的首字母或汉语意思，填上恰当的单词使句意完整。 (共5小题；每小题0.5分, 满分2.5分)
76. The top leaders of the two countries are holding talks in a friendly __________（气氛）.
77. The sales c____________ was aimed at the mass market.
78. The salesmen were trained to deal with customer ____________(投诉) in a friendly manner.
79. There is a room spacious enough to a ______________ 10 dinner tables in this restaurant.
80. Ron will lend me the money on c___________ that I pay it back next month.