水的比热较大，人们往往利用它的这一特性为生活、生产服务，下列事例中与它的这一特性无关的是（  ）

用所给动词的适当形式填空，完成短文

 Children’s Safety

I ____(talk) to some students. I ____(ask) about safety rules when they ____(be) younger. Their rules were very good.

John ____(say), “I couldn’t play in the kitchen.” His mum and dad didn’t ____(like) that.

Jennifer ____(can) play the piano and she could also ____(play) games in the living room. When her mum and dad ____(not, be) home, she couldn’t cook.

Tom could play in the bedroom or the living room. He couldn’t ____(play) in the bathroom or the kitchen.

What ____(be) your safety rules when you were young? ____(talk) to younger students about these and ____(help) them.

若点（$x_1$，$y_1$）、（$x_2$，$y_2$）和（$x_3$，$y_3$）分别在反比例函数$y=-\frac{2}{x}$ 的图象上，且　$x_1<x_2<0<x_3$，则下列判断中正确的是（　　）

I have to ____ (get) up at six o'clock.