1．(2020·全国卷Ⅲ)________ he asked the villagers on the banks of the river where he could find the legendary(传奇的)artist，they smiled and pointed down the river.
解析： 考查状语从句。When/As在句中表示“当……时”。
答案： When/As
2．(2019·天津卷)Tom is so independent that he never asks his parents' opinion________he wants their support.
解析： 考查状语从句。句意：汤姆很独立，除非他想得到父母的支持，否则他从不征求父母的意见。根据语境可知，这里用从属连词unless“除非”引导条件状语从句。
答案： unless
