一、1、terrible/tiring
2、delicious
3、boring
4、expensive
5、clean
二、1、activities
2、wet ， umbrellas
3、felt like
4、differences
5、hungry
6、top
7、decided ， bike/bicycle
8、enough
9、trader
10、buildings
三、1、decided
2、rode
3、started
4、saw
5、took
6、felt
7、stopped
8、ate
9、drank
10、got
11、were
12、forgot
四、1、Four.They were his parents ， his brother and him.
2、They sang English songs ， played a lot of games and watched English movies.
3、Yes ， because it was the first time in his life to make money.
4、She went swimming.