We’d better set off，or it will be dark we know it.
A. before B. after C. when D. until
We’d better set off，or it will be dark we know it.
A. before B. after C. when D. until
A
考查状语从句的连词。语境表示“还不等我们意识到”，用before引导状语从句表示“在……之前”。