-The terrible accident might not have happened had the driver been more careful.

--But he _____.

A．wasn’t

B．didn’t

C．hadn’t

D．doesn’t

建筑安装工程造价中的规费包括()。

A.环境保护费

B.工程定额测定费

C.社会保障费

D.住房公积金

E.危险作业意外伤害保险