unit 2 growing pains ⅰ.单项填空 1. i don't believe we've met before，________i must say you do look familiar. a．therefore b．although c．since d．unless 答案 b [考查状语从句。句意：尽管我必须说你的确看起来面熟，但我认为我们没见过面。此处为让步状语从句，故用although引导。] 2．after five hours on your feet，you ________a break.
