79. Sugar is not an important in bread , but flour is ______ .

　 A. unique　　 B. essential　　 C. natural　　 D. adequate

78. I wrote him a letter to show my ______ of his thoughtfulness .

　 A. achievement　　 B. agreement　　 C. attention　　 D. appreciation

77. We all know that _______ speak louder than words .

　 A. movements　　 B. performance　 C. operation　 D. actions

76. Many scholars and experts from all over the world will be invited to attend this yearly _____ on drug control .

　 A. reference　 B. intention　 C. conferenc　　 D. interation

75. Julie wants to buy a _______ computer so that she can carry it around when she travels .

　 A. memorable　　 B. portable　 C. predictable　　 D. readable

74. Tom looked at Jenny , tears ______ his eyes , and shouted out the words ______ in his heart for years .

　　 A. filled ;having been hiding　 B. filling ;hidden　 C. filling ;hiding　 D. filled ; hiding

73. Food prices ______ ,they decided to ______ their expense .

　　 A. gone up ; cut　 B. raising ; cut　 C. rise ; limit　 D. going up ; limit

72. A letter ______ ., he hurried to the shop for some shopping .

　 A. posting　 B. having posted　　 C. posted　　 D. had been posted

71.These light industry goods are welcomed ______ and abroad .

　 A. at a distance　　 B. at cost　　 C. at once　　 D at home

70. As soon as we _______ , our ship left port . Which is wrong ?

　 A. went aboard　　 B. went on board　　 C. go on the ship　 D. went abroad