We found the key _____ she lad left it.为什么?

问题描述:

We found the key _____ she lad left it.为什么?

where,引导地点状语从句,从句中主谓宾齐全,只缺少状语,因而用where,译为我们在她留下的地方找到了钥匙.如果题目改为we found the key_she had left ,这时填which 或that引导定语从句,因为从句中缺少宾语成分.