根据句意首字母提示完成下列单词.

　　I must b ______________ my sister, she is too young.

　　根据句意及首字母完成单词

　　Where's the j________ music?

　　Go u________.It's b ________ the dance music and the pop music.

根据句意及第一个字母提示，填出该单词，并使句子意思完整

Listen! The b _ _ d _ are singing in the tree.

　　根据句意及首字母完成单词

　　Let's see the koala b________.

　　根据句意及首字母提示补全所缺单词.

　　I have a b ________. I have to go to the hospital.