问题补充：
They didn’t find the medicine.
A. what’s the matter with
B. what was the matter with
C. what the matter was with
D. what the matter is with
答案：
A. what’s the matter with
(答案→)B. what was the matter with
C. what the matter was with
D. what the matter is with
解析：考查宾语从句，what引导宾语从句在宾语从句中做主语，所以what was the matter就是陈述句语序，做宾语从句时动词后直接接what was the matter with…，句意：他们没有发现这个药怎么了。选B。
