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1 my teacher ( )when I ( )at his office

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1 my teacher ( )when I ( )at his office
A left ,had arrived B left ,arrive C had left ,had arrived D had left ,arrived
2 could you please tell me what time the train ( )Shenzhen for Beijing
I am afriad you need to ( )on the Internet
A left ,look for it B left ,look at it C leaves ,looks it up D leaves ,looks it over.
D,C
1.这句话是说当我到了老师的办公室时,他刚好离开了,则离开这个动作是发生在我到了的动作之前.又整个句子陈述的是过去发生的事情,故用过去时态,则第二空应为 arrived,第一空动作发生在过去的过去,即 arrived之前,则用过去完成时,这是过去完成时的标志,故选D
2.火车出发时间是按时刻表走的,故用一般现在时表将来,用 leaves,第二个空是说你需要在网上查一下,表示查询的短语是 look up ,look for 是寻找,look at 是看,look over 是检查