1．children need to ________ (经历) things for themselves in order to learn from them. 2．they have bought some ________(家具) for their new home, mostly secondhand. 3．the big fire was one of the worst ________ (灾难) that had ever hit london. 4．as a matter of fact, drunken driving is as harmful as ______ (暴力的) crimes to the people's life and safety.
