________wewenttovisitProfessorSmith,he________hisresearchwork.A.Thefirstt

________we went to visit Professor Smith, he________his research work.A.The first time; devoted toB.Whenever; was concentrate onC.For the first time; was busy withD.Each time; was absorbed in

D解析试题分析：Each time每次；The first time第一次；Whenever无论何时；逗号前后都是一个句子，故第一空应选连词，所以排除C，devote to致力于；concentrate on集中精力于；be busy with忙于；be absorbed in专心于。句意：每次我们去看望史密斯教授时，他都在专心于他的研究工作。考点：考查连词和动词短语的用法。点评：本题难度适中。判断从句中用哪个连词，需用记住连词的用法，在句中的作用，连词也是高考的热点，需要考生平时多练习。需要考生会分析句子成分理解句意。对于动词短语考查提醒考生平时加强背诵短语的意义及用法，命题者还考查学生对语境的理解。即学即练：I'd like to see you ______ it's convenient.A.The first time B.Whenever C.For the first time D. Each time解析：B。句意：在你方便的时候我想来看看你。

哦，回答的不错