题目

66 I’m very hungry –I ____________（错过）lunch. 67. Jack took a deep ____________(呼吸）and then dived into the water. 68. I ‘ve got an ______________(普通）sort of car,nothing special. 69. I want to thank everyone who has ______________(鼓励）and supported me . 70. Jenny spends hours in front of the            （镜子）! 71. It is ______________(稍微）colder today than it was yesterday. 72. The story is written by an ______________(澳大利亚）engineer. 73. Tom was _______________（羞愧）of having lied to his parents. 74. _______________（一月）一定质量的氯化钡溶液和10g溶质质量分数为9.8%的稀硫酸恰好完全反应后，过滤得到28.47g滤液．请计算：①生成硫酸钡沉淀的质量；②氯化钡溶液的溶质质量分数．