lots of empty bottles were found under the old man's bed .he must have done nothing but _____
问题描述：
lots of empty bottles were found under the old man's bed .he must have done nothing but _____
为什么选 drink 原型?
答
do nothing but do sth.是固定搭配,“除了...什么也没有干”,but 后面要求跟动词原形.