补充句子
根据下面对话中的情景，在每个空白处填入一个适当的语句，使对话恢复完整。
A: ____________________________
B: Well, I really like math best. _____________________
A: No, math is boring for me. Science is my favorite.
B: ______________________________________
A: I have science on Thursday afternoon. _____________________
B: I have two history classes every week.
A:___________________________________
B: Mr. Liu. He is a great history teacher.