Hello! My name’s John. I’m in Beijing now. It’s hot in Beijing. It’s sunny too.

I can wear my shorts and shirt. My shorts are green. I have a new jacket. My old jacket is too small. I want to buy a hat.The hat is very pretty, but it is $60. that’s very expensive.

The hat is cheap.

初三年级学生小米向父亲保证期末考试取得优异成绩，可结果却不尽如人意。小米正确的态度应该是（   ） 

如图，已知抛物线y= $\frac{1}{3}$ x²+bx+c经过△ABC的三个顶点，其中点A（0，1），点B（9，10），AC∥x轴，点P是直线AC下方抛物线上的动点．