I happened to meet one of my old colleagues when I spent my holiday in Shanghai. We both worked in the MRO 15 years ago. ( )
A.I met one of my old colleagues suddenly when I spent my holiday in Shanghai. We both worked in the MRO 15 years ago. B.I took place to meet one of my old colleagues when I spent my holiday in Shanghai. We both worked in the MRO 15 years ago. C.I met one of my old colleagues by accident when I spent my holiday in Shanghai. We both worked in the MRO 15 years ago. o正确答案C
