英语定语从句与表语从句

问题描述:

英语定语从句与表语从句
The place_____the bridge is supposed to be built should be ____the cross-river traffic is the heaviest.
空格处应该填什么,说明理由.

第一个空是at which第二个空填where
因为,前面是一个定语从句,先行词“the place”在从句中做地点状语,连成一句话是:the bridge is supposed to be built at the place,所以除了用关系副词where之外,还可以介词提前的形式:at which(介词后不能用that);后面的从句是一个地点状语从句,所以就用where.