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　　（91）Drop in=drop by=visit

　　（92）Due 到期的

　　例句：The book will be due next week.

　　（按计划，安排要）发生，到达的

　　例句：What time will the next bus due？

　　due to =because of=owing to 因为，由于

　　例句：His promotion is due to his hard working.

　　Due to the heavy rain， we have to give up the plan for the weekends.

　　（93）Economic 经济的 economical 节俭的

　　（94）Effective 有效的 efficient 效率高的

　　（95）Else 其它的 something ~ somebody ~

　　（96）In the end 终（结果） at last 后（经过很长时间）

　　例句：I have finished the essay at last.

　　We were thinking of going to England， but in the end we went to the USA.

　　（97）Enjoy oneself=have a good time 玩的开心 help oneself 随便

　　（98）Establish=set up=found

　　（99）Evident=obvious=apparent 明显的 显而易见的

　　（100）For example=for instance

　　（101）Be exhausted=be tired out =be worn out 筋疲力尽的

　　（102）Exist 存在

　　（103）Expose 暴露 受影响

　　例句：Being exposed to the sun for some time can do good to your health.

　　Many of today's teenagers have been exposed too much to violence and sex.

　　（104）Face up to （勇敢）面对 be faced with 面临 encounter 面临

　　（105）In fact as a matter as a fact 实际上 事实上

　　（106）Be familiar with

　　（107）By far 非常，（修饰比较级和）

　　so far 迄今为止（完成时态） far from 远非（否定）

　　例句：In my opinion， he is by far the most suitable one for the job.

　　He sent out a letter to apply for the job， but has received no answer so far.

　　My English is far from perfect.

　　（108）Fare 交通费 fee 费用 tuition 学费

　　（109）Favor do sb a favor 帮… 个忙 in favor of 赞成

　　例句：I'm in favor of his suggestion that a power plant（电厂）be built.

　　Would you do me a favor to carry the box upstairs？

　　（110）Feel like doing sth would like to do sth 喜欢/想做…。