阅读下面短文，在空白处填入一个适当的词，或填入括号中所给单词的正确形式。

Dear Jane,

Thank you for your letter. It's good that you like your school. I go to school Monday to Friday. I have four classes in the morning two classes in the afternoon. I am busy after class. On Monday and Wednesday afternoon I play volleyball for two hours. On Tuesday afternoon some of us have a (sing) class. And on Thursday afternoon some (have) a computer class. On Friday afternoon I learn (speak) English with my English teacher. On Saturday and Sunday I don't go to school. I often stay at home with my father and mother.

Love,

Lin Mei