[解析]
30. 由文章可知各国的交通规则是不一样的。The traffic rules are the same in every country.各国的交通规则是相同的。描述错误。故答案为:×。
31. 由Yellow means"Wait".(黄色表示"等"。)可知黄色表示"等"。Yellow light means "Wait".黄灯的意思是"等待"。描述正确。故答案为:√。
32. 由The traffic lights are the same in every country.There are always three lights:red,yellow and green.(总有三个灯:红、黄、绿。)可知每个国家总有三个灯:红、黄、绿。红There are always three lights in every country:red yellow and green.每个国家都有三种灯:红、黄、绿。描述正确。故答案为:√。
33. 由In England and Australia,however ,drivers drive on the left side of the road.(然而,英国和澳大利亚的司机在道路的左侧行驶。)可知英国和澳大利亚的司机在道路的左侧行驶。In Australia,drivers drive on the right side of the road.在澳大利亚,司机在道路的右侧行驶。描述错误。故答案为:×。
34. 由If you go by car,by bike or on foot,you must know the traffic rules.(如果你开车、骑自行车或步行,你必须了解交通规则。)可知如果你开车、骑自行车或步行,你必须了解交通规则。If you go on foot ,you don't have to know the traffic rules.如果你步行去,你不需要知道交通规则。描述错误。故答案为:×。