can you think of a situation XXXXXXXXXX the idiom is used properly

题目

can you think of a situation XXXXXXXXXX the idiom is used properly
补充2个 a new bridge XXXhere ,they hope to finish it next mouth
they walked together as far as the second crossing XXXXXXXXX they parted

答案

in which /where 都可以
situation相当于地点类,用where.
问题补充：补充2个 a new bridge here,(which) they hope to finish (it这里应该是没有的) next month.本句的which在从句中做宾语.
they walked together as far as the second crossing (where) they parted
本句的where在从句中做状语.