as we all know, fire is one of the most terrible killers in our modern society.we know that fire is mainly caused by smokers, followed by defective insulations and children playing with matches.
in 2002 ,thousands of fire happened all over the country, of which 50 percent was caused by smokers who left cigarette-ends everywhere. those who smoke should make sure that the cigarettes are stubbed out before being thrown away. also, smoking should not be allowed in public places. 30 percent of fire was caused by defective insulation. workers should know the importance of good insulation for peoples lives. at homes we must pay special attention to electric wires and make sure that they are safe. 20 percent of fire are caused by children playing with matches. we should warn children of the danger of playing with matches.
no matter what type of the reason it was, there was one thing in common:carelessness. so if everyone in the country is careful enough, more fire could be avoided.
牛津实用英语语法:149 表示无义务的各种形式
牛津实用英语语法:127 may用来表示许可
牛津实用英语语法:124 形式
牛津实用英语语法:137 can/am able,could/was able
牛津实用英语语法:152 needn't+完成式
牛津实用英语语法:109 对他人说话表示同意或不同意
牛津实用英语语法:150 need not与其他各种形式的区别
牛津实用英语语法:144 must和have to的各种形式
牛津实用英语语法:118 构成各种时态的形式及用法
牛津实用英语语法:129 may和can用来表示现在或将来的许可
牛津实用英语语法:143 ought/should与完成式连用
牛津实用英语语法:110 附加疑问
牛津实用英语语法:155 need意指require(需要)
牛津实用英语语法:161 dare
牛津实用英语语法:132 may/might表示可能
牛津实用英语语法:112 对一个说法作补充
牛津实用英语语法:156 must表示推断
牛津实用英语语法:131 请求许可
牛津实用英语语法:157 must与may/might的比较
牛津实用英语语法:136 can和 be able的各种形式
牛津实用英语语法:151 must,have to和 need用于疑问句
牛津实用英语语法:164 现在进行时形式
牛津实用英语语法:121 have+宾语+现在分词
牛津实用英语语法:114 be+不定式
牛津实用英语语法:107 助动词:形式与句型
牛津实用英语语法:133 may/might+完成式
牛津实用英语语法:111 附加评论
牛津实用英语语法:165 拼写
牛津实用英语语法:179过去式主要用法
牛津实用英语语法:145 肯定句中 must和 have to的区别
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