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（_____）1. How old are you?
A．Ten gifts.
（_____）2. How many gifts?
B．Sure. Here you are.
（_____）3. May I have a look?
C．Thank you.
（_____）4. Can I have some juice?
D．I’m fine, thank you.
（_____）5. How are you?
E．Great!
（_____）6. This is for you.
F．Thanks.
（_____）7. Happy birthday!
G．OK. Here you are.
（_____）8. Let’s eat the cake. H. I’m 10.
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
