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（___） 1. A. It’s time for breakfast. B. It’s 6:25 a.m. C. It’s on the first floor.
（___） 2. A. OK. Let’s go. B. No, thank you. C. Good afternoon.
（___） 3. A. Hurry up! B. Thank you, Mum. C. I like to drink milk.
（___） 4. A. She’s from the UK. B. It’s time for PE class. C. She is in the classroom.
（___） 5.A. It’s time to go to bed. B. It’s time for lunch. C. It’s time to get up.
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
