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It is Sunday today. It's 2 o'clock now. And it is raining. Alice and her family are at home. Alice is ten years old. She is playing the music in her bedroom. Her father is in the living room. He is reading a story book. Her mother is doing some washing. How about her sister, Kitty? Oh! She is helping her mother. She is helpful at home.
1．It's ________ now. ( )A． | B． | C． |
| A．10. | B．9. | C．8. |
| A．speaking English | B．playing the music | C．sleeping |
| A．study | B．living room | C．kitchen |
| A．Yes, she is. | B．No, she isn't. | C．We don't know. |
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
