单词拼写答案：1 Most people like to use this piece of music as b( ) during the break

单词拼写答案：1 Most people like to use this piece of music as b( ) during the break
2 When I reached school yesterday,the class had already b( )
3 There's d( ) in front.A big hole,you see?
4 We are c( )empty bottles to raise money for poor kids.
5 Mom t( ) me to ba an honest boy all the time
6 Put your h( ) into study,and you'll experience the joy of it
7 The book is really h( ) so that I pass the exam finally