下列各项中，属于票据行为的有（）。
A.出票
B.背书
C.承兑
D.保证
参考答案：A, B, C, D
Not until all the fish died in the water _____ how serious the pollution was.
A．did the villagers realize
B．the villagers realized
C．the villagers did realize
D．didn’t the villagers realize
现金险的保险责任包括（）
A.火灾、爆炸
B.风暴、飓风
C.抢劫或入室抢劫
D.盗窃
