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
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
C
解析：本题考查了定语从句的有关知识。第一空用at which可以使之在引导定语的同时在从句中充当表语。