第17题: [单项选择]The place ______ the bridge is supposed to be built should be ______ the cross-river traffic is the heaviest. A. which; where B. at which; which C. at which; where D. which; in which 参考答案:C 答案解析:[考点] 状语从句和定语从句交叉使用 [解析] 第一个空是定语从句,表示“在……地方”,应用at the place,因此此处用at which引导定语从句;第二个空考查表语从句的引导词,从