【小题1】. You (没必要告诉) her the news yesterday, for I had told her earlier.（need）
【小题2】. As we all know, it was (他的粗心) that resulted in the car accident.(careless)
【小题3】. The press conference, originally (将在明天举行), has to be put off for some reason.(hold)
【小题4】. (是我莫大的荣幸) to have been invited to speak at the ing 100th anniversary of our univerity. (honour)
【小题5】. If it had not been for your help, (我们不会生活幸福) now.(live)
【小题6】. Some experts remend signs and posters be put up in areas (不允许抽烟的地方).（allow）
【小题7】. (没有公汽)at that time, we had to walk home.(there)
【小题8】. I really don’t know where I (钱被偷). (have)
【小题9】. It was the driver rather than the two children (为……负责)the accident.(responsible)
【小题10】.No sooner (我们一冲出) of the building than it fell down---how lucky we were! (rush) .needn’t have told
网友回答
(答案→).needn’t have told
解析： 略