阅读下面短文,在空白处填入一个适当的词,或填入括号中所给的单词的正确形式。
Bill, Lisa
and Peter are classmates. They're all 13 {#blank#}1{#/blank#} (year) old. Bill likes music.
He can play {#blank#}2{#/blank#} guitar, but he can't play the violin. He thinks it's
difficult {#blank#}3{#/blank#} (play) the violin. Lisa likes music, too. She {#blank#}4{#/blank#}
(sing) English songs very well, but she can't sing Chinese songs. Peter likes
sports. He can play basketball well. {#blank#}5{#/blank#} he can't play soccer. He says
soccer is boring.