补全下列对话。

  Sally：How was your Labour Day holiday，Rick?

  Rick：It was____．

  Sally：Where did you go?

  Rick：I went to Sanya with my____．

  Sally：How did you go there?

  Rick：We went there by____．

  Sally：Did you go____there?

  Rick：No．The weather was a little cold．We went____there．It was fun!

  Sally：Sounds interesting!

    This is my school. There are many trees and flowers in it. The teaching building is big and tall. There is a big playground in our school. After 4:30 in the afternoon, many students come to the playground to play football and some students play table tennis in the table tennis room.
There are 1,200 students in 25 classes in our school. The students all like to study. The teachers in our school are very good. They help the students to study and the students like them, too.

函数y=${\log }_{\frac{1}{2}}\left(x^2-2x\right)$的单调递减区间是____