When I was doing shopping in the market the other day, I _____ an old friend of mine, who I hadn’t met for twenty years.

A．came up

B．came over

C．came across

D．came about

风险自留的适用条件包括（）。

A.别无选择

B.期望损失不严重

C.损失不可准确预测

D.投资机会很好或机会成本很大

E.保险转移