82. Long-time e_______ of the body to strong sunlight is harmful. (暴露)

81. Children in China are educated at public e_________. (费用、开支)

80. Our head-teacher’s d_________ to her work makes us love her more. (忠诚)

79. Both Tom and Jack are very tall, but the l_______ looks stronger. (后者)

78. It was c_______ that led to his opening his sister’s letter. (好奇心)

77. Canada is a b________ country, with English and French as its official

　Languages. (双语的)

76. Mrs. Clark is a regular c________ of this shop and she has developed

friendship with the clerks here. (顾客)

75. I’m sorry. We don’t e________ guests today, as the kitchen roof is being

　 mended. (招待)

74. You are at l________ to say what you like. (自由)