It ____ for three hours and the ground is too wet toplay on, so the sports meet  _____.    [ ]

A. was raining;has been put off      

B. has been raining;has been put off        

C. has rained; put off      

D. has been raining;has put off

企业什么时候才能获得有竞争力的业务敏捷性。（）

A.当所有的服务使用相同的通信机制，从而得到高响应速度时

B.当业务流程的变更不需要修改应用程序的逻辑时

C.当服务的数量比单个业务所需要的更少时

D.当公司的服务比竞争对手的可比较的服务更快时