下列实验操作正确的是（  ）

阅读短文，判断正误。

I'm Zhang Peng. It's 6：40. It's time to get up. I wear my new shirt. It's yellow. And I wear my green shorts. They're old. But I like them very much. I have PE class today，so I wear my white shoes. At 7：00，I have some hamburgers and milk for breakfast. Then I go to school at 7：20.

根据课文内容填空。

①他穿着____，戴着____，挑起____，跟大家一块儿爬山。

②周总理一手端着____的银碗，一手拿着____蘸了水，向人们____，为人们____。

③____事竟成。

④有志不在____。

设双曲线  $\frac{y^2}{a^2}-\frac{x^2}{3}=1$的两个焦点分别为F₁、F₂离心率e=2.

A —— salesgirl         B —— customer
A: Good afternoon, can I help you?
B: Yes, ____ 
A: We have different kinds of sports shoes. They’re all in style. What color would you like?
B: I prefer blue.
A: ____ ?
B: Size 40.
A: What do you think of this pair?
B: Great! ____  ?
A: Certainly. This way, please.
B: Oh, they fit me very well. ____ ?
A: 500 Yuan.
B: ____ . I can't afford.
A: Well, I'll give you a 20% discount.
B: OK. I'll take them.