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B: Sorry, he isn't in. Who's that?
A:
B: He is going to the street.
A: What is it? I only ask you a question about him.
B: Certainly.
A: When does he usually do sports?
B:
A:
B: About 9 in the morning.
A: I want to ask him to play football with me. Can you tell him about it?
B: Certainly.
A: Thank you.
B:
| A．That's all right. |
| B．May I speak to Li Feng? |
| C．This is his friend. |
| D．Sometimes on Sunday. |
| E．What time is it? |
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
