试述急性红白血病及其特点。

根据情景，把下面对话内容补充完整，使其意思连贯。

(P=Peter, an exchange student from the UK; W=Wang Tao, Peter's classmate)

W: Hi, Peter. Shall we play football after school?

P: 1______. But I would like to try something new.

W: Oh, what's that?

P: Table tennis. 2______.

W: Yes, we play it a lot. Can you play it?

P: No, I can't. I tried, but 3______.

W: Well, never mind. You can play football very well.

P: 4______ for saying so, but you must teach me how to play table tennis.

W: No problem. 5______.

P: Great. Every Friday after school.