A cough is usually nothing to worry about unless it lasts for ten days .
A. or more
B. instead
C. at most
D. only
网友回答
(答案→)A. or more
B. instead
C. at most
D. only
解析:
题意是“咳嗽通常情况下没什么担心的,除非它要持续1天或者更长时间”。or more中的or表示选择关系,不是构成固定结构,其后省略了days。at most最多;instead代替;only仅仅,只有。