根据所给提示，完成句子。每空一词，含缩略词。
1. Cao Hua swims fastest in our group. (改为否定句)
Cao Hua _____________ _____________ fastest in our group.
2. They went to Yunnan last summer. (对划线部分提问)
______________ ______________they go to Yunnan?
3. What do you think of the program called Daddy, Where Are We Going?(改为同义句)
______________ d
o you _____________ the program called Daddy, Where Are We Going?
4. 尽管这道数学题有点难，但我相信你能解答出来。（完成句子）
Although this math problem is a bit difficult, I believe you can ___________ it ___________.