—An astronaut．I wish to find some new planets and develop a relationship with people there．

中国邮政于2015年1月10日发行一枚以“拜年”为主题的特种邮票。仔细观察这枚邮票，完成下面的任务。

A: Hello! May I speak to Mary?

B: Speaking.

A: This is Lin Tao. 1

B: I am watching a soap opera at home.

A: 2

B: In fact, I don't mind it.

A: I don't like soap operas, either. So, do you want to go to a movie?

B: 3 I went to the beach last weekend. It made me feel tired.

A: How was your weekend?

B: 4 The beaches were beautiful, the food was delicious, and the people there were friendly.

A: Really?I want to go there. But my parents don't.

B: Don't mind 5. Just do what you like to.

A: OK, I will. Bye.

B: Byebye.

已知函数y=log₂（ax﹣1）在（﹣2，﹣1）上单调递减，则实数a的取值范围是（   ）