根据对话内容，在空白处填写适当的话语（话语可能是一个句子，也可能是一个短语或一词)，使对话完整 。
A: Look! Our classmate Li Lei is playing basketball there.
B: Yes. He likes it very much. He practices playing basketball every day.
A: But we students should concentrate more on our studies than games. Playing too much can get 1
of schoolwork.
B: 2 . We should spend more time on our studies. But being professional basketball player like Yao
Ming is his dream.
A: 3 .
B: He knows that. But he thinks if he works hard, he will have a chance of achieving his dreams.
A: Do his parents wish him to be a professional basketball player?
B: No. He 4 . He thinks teenagers should be allowed to decide to do something by themselves.
A: 5 I think we should talk with our parents and ask them for permission (允许) when we need to
make important decisions. we are still young!
2SO3(g)，下列说法中，可以说明反应达到化学平衡状态的是[ ]