追溯到…… 7．________________

　　集中 8．________________

　　寻找 9．________________

　　轮流做某事 10．______________________

　　禁不住做某事 date back concentrate on search for take turns to do sth can’t/couldn’t help doing 典型句式

　　1．It was/is...that/who强调句式 You must be aware that____________(就是在这儿)we found evidence of some of the earliest people who lived in this part of the world. it’s here that 2．if only...意为“要是……就好了”,句中要用虚拟语气 ____________(要是)it could be just like last year! If only 3．...had done...when　when引导时间状语从句，表“这时”。 She__________________(就要到达)her destination________(这时)a delicious smell arrested her progress and she stopped. had almost reached when 4．only to do...不定式短语在句中作结果状语，强调意想不到的结果 Abruptly she sat down，___________________________(结果被抱起)by her laughing，shouting sister，Luna. only to be scooped up 现在完成进行时态 1．(2011·高考北京卷)Tom __________ in the library every night over the last three months. 单元语法 A．Works

　　B．worked C．has been working

　　D．had been working 解析：选C。句意为：在过去的三个月里，汤姆一直每晚都在图书馆工作。本题考查动词的时态。根据时间状语over the last three months可知用现在完成进行时，故选C项。 2．(2016·安徽江南十校联考)—Sir，I’m here. —Please listen.I________asking your parents to come to our school，but I’d like to hear your opinion first. A．have considered

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