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