什么是定语从句,定语在句子那个部分,that who which whom whose 怎么选 ...答:例1变为肯定句: This museum is ___ you visited a few days ago.例2变为肯定句: This is the museum ___ the exhibition was held. 在句1中,所缺部分为宾语,而where, that, on which都不能起到宾语的作用,只有the one既做了主句的表语,又可做从句的宾语,可以省略关系代词,所以应选D。 而句2...