根据句意和所给单词的首字母写出所缺单词
1．What's your f________sport?
2．What do you have for b________?
3．We all like playing c________games.
4．S________is good for health.
5．What s________do you study at school?
6．We all like our math t________.
7．I have history on Monday and W________.
8．I like science because it's i________.
9．We C________people are friendly（友好的）to others.
10．B________is a difficult subject for me.