. --- Believe it or not, I passed the driving test at the first attempt yesterday.--- Great! But remember you can never be ___ careful when driving a car in the street.

 John had planned to make a compromise， but      he changed his mind at the last minute.

The traffic problems have severely affected economic development. ________, we must spare no efforts to solve them.

Having been told ________ where he lived, I had no difficulty in finding Peter’s address.

The mother looked at the door _______，expecting the children’s coming．