若是没什么事就说:Oh,it's Ok;It's nothing等等
若是有事:I have a trouble(有麻烦了)或者I have .自己添什么问
A: What's the matter? B: I have a sore throat.
A: What's the matter? B: I have a cold.
A: What's the matter? B: I have a stomachache.
A: What's the matter? B: I have a sore back.
A: What's the matter? B: I have a toothache.