Ⅰ.单词拼写
1．She switched (打开) on the washing machine, and threw the dirty clothes in.
2．The guard blew (吹响) his whistle, and the train moved off.
3．A police car passed him at top speed, sounding its horn (喇叭)．
4．An acid can react(反应) with a base to form a salt.
5．They have found the solution (解决办法) to the math problem.
6．The good news dragged me out of my black mood (心情)．
7．The flight has been delayed because of traffic congestion (拥塞) at London airport.
8．There may be a small charge (费用) for the library card, normally no more than one or two dollars.
9．We were delayed by a traffic (交通) jam on the highway this morning.
10．A smile can help us get through difficult situations (处境) and find friends in a world of strangers.
