28.A 29.B 30.B 31.C 32.B 33.B 34.B 35.A 有把握的答案.有哪些疑问可以再提, 再问: 嗯,采纳遣词造句76到80 再答: 76. You can't swim in the river. 77.Sally was shopping at that time. 78.It's good for you to eat eggs. 79.I found my bag yesterday. 80.I have to see the dentist because I have a toothache. 呵呵,记得采纳哦