The computer centre,_last year,is very popular among the stu

The computer centre,_last year,is very popular among the students in this school
A open ,B opening C having D opend
不是逗号后面用原型的么..为什么不是A啊

不选open 选opened (因为你这四项里一个opened也没有,不知道是不是你的D写错了)
the computer centre,____ last year.去年开的这个电脑中心,电脑中心是被开的,是被动关系.所以就等于 the computer centre which was opened last year ,然后省略掉which was 而得到的opened last year 注意这里的opened 不是因为是过去式,而是因为是被动语态的关系,现在式或者过去式是由前面的which后到底是was 还是is 决定的 而不管这里是过去还是现在,省略掉之后都填opened
如果你即使要选主动语态,因为这里逗号之间的为插入语的关系,所以 这里open这个动词必定为 非谓语动词 ,而非谓语动词修饰时 要么是ing 形式要么是过去分词,而到底是哪个取决于主动还是被动关系,.像这题 首先排除的就是A选项open ,没有逗号之后用原型这一说,要么选B要么选D (opened),犹豫上面已经分析过了是被动结构 ,故选opened
可以仔细阅读下以下资料:
这里涉及到的是定语从句的简化概念 .简化为 分词短语,而到底是现在分词(也就是ING形式)还是过去分词要根据 被修饰的那个词(或者从句里的关系代词)是作主动还是被动.
1 首先来看做主动的情况,也就是简化为现在分词ing形式
关系代词所引导的定语从句为限制性修饰（关系代词前无逗号）,且该关系代词在从句中为主语时,可将从句简化为分词短语,方法如下：
第一步：删除关系代词；
第二步：将关系代词后的动词变为现在分词；
第三步：若动词是be动词,变成分词being后省略.
eg.The girl who lives next to my house is my classmate.
=The girl living next to my house is my classmate.
John is a young boy who is full of energy.
= John is a young boy (这里的being 是被省略的)full of energy.
2 再看看做被动的情况,也就是简化为过去分词的形式
如果被修饰词与后面 修饰它的从句为被动的逻辑关系 如(被修饰的)book 被作者写,后面的从句省去which was之后就接的是written (被修饰的)car 被人开 后面的从句省去which was之后是driven
Have you ever read the book which was written by that author
=Have you ever been read the book written by that author
This is the car which was driven by my brother in the race.
= This is the car driven by my brother in the race .
可以看出 the computer centre,____ last year.去年开的这个电脑中心,电脑中心是被开的,是被动关系.所以就等于 the computer centre which was opened last year ,然后省略掉which was 而得到的opened last year 注意这里的opened 不是因为是过去式,而是因为是被动语态的关系,现在式或者过去式是由前面的which后到底是was 还是is 决定的 而不管这里是过去还是现在,省略掉之后都填opened