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1．当你的你家来了一个客人，你想问你的妈妈，他是谁的时候，你会说：
| A．What is it ? |
| B．Where is it ? |
| C．Who is he? |
| A．She is a teacher. |
| B．He is Jack. |
| C．She is Kate. |
| A．I am doing my homework. |
| B．I am a student. |
| C．I want to go shopping. |
| A．You can write them. |
| B．I can draw them. |
| C．I can write them. |
| A．I can help you. |
| B．Are you busy? |
| C．What can I do for you ? |
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
