Ⅰ、1、expensive
2、interested
3、hear
4、exciting
5、dark
Ⅱ、1、had
2、got
3、was；is
4、to have
5、didn't swim
Ⅲ、1 - 5 D C C B B
Ⅳ、1、What did；do
2、took the bus
3、bought；for
4、didn't swim
5、Did；take
Ⅴ、1 - 5 C B D B A
6 - 10 D C D B C
Ⅵ、1、Yellow./They are yellow.
2、In February 2010./February 2010.
3、Two./Two adults are needed.
4、They usually listen to music.talk on their phones or just sleep.
5、It can keep children safe and help to protect the environment.