补全对话（共5小题，每小题2分，满分10分）
根据语境，用恰当的语言完成对话。
（Happy is talking with his classmate, Cheng Cheng, on the hallway.）
Happy=H Cheng Cheng=C
C: Happy, summer vacation is coming soon. How happy!小题1:______________________?
H: I’ve no idea. Maybe I’m traveling with my classmates.
C: But do your parents allow you to travel by yourselves?
H: I’m not sure. But I think teenagers should be allowed to make their own decisions.
C: 小题2:______________________________. We are old enough to take care of ourselves.
H: That’s right. 小题3:______________________________________________ ?
C: Sorry, I’m afraid I can’t go with you. I’m planning to join an English language club.
H: Wow, why do you work so hard? Your English is good.
C: 小题4:______________. But not good enough. I always dream about studying aboard (往国外) one day.
H: That sounds good. 小题5:____________________________________________?
C: It’s certain that I’d like to go to an English-speaking country. But I don’t know which one exactly right now.
H: You’re great. I think you can make your dream come true.
2NO2(g)(红棕色)。下列结论不能说明上述反应在该条件下已经达到平衡状态的是[ ]