第二节 书面表达
一、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. You must be s_______! Come and eat lunch.
77. Please make a social s________ on what your neighborhood committee has done recently.
78. In order to keep fit, we really need a b__________ diet.
