补全对话。

A: Did you go to the zoo last Sunday, Tony?

B：No，l                 ____．

A: Were there any sharks in the aquarium?

B:No,2                   .But there were some really smart seals.

A: That sounds interesting. Did you have a good time？

B: Yes, I enjoyed myself very much.  By the way, 3                 , Joe?

A:I went to the countryside to see my grandparents and my cousins.

B：4                      ？

A：It was very cool．

B：5                    ．

A: That's right .I played with my Cousins happily.

夏天时人们常喝碳酸饮料，打开碳酸饮料的瓶盖时冒出的气体就是二氧化碳。我们向清水中注入二氧化碳，加入少量紫色石蕊试剂，溶液颜色为______，再将溶液加热片刻，这时溶液颜色为______。