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Amy: Mum,
Ms Smart: Tom, you shouldn't play with the CDs!
Tom: Sorry, Mum.
Ms Smart: And you shouldn't throw the books everywhere.
Tom:
Ms Smart: Tom, you should tidy your toys.
Lingling: We'll help you, Tom.
Tom:
Ms Smart: Wow. The room is clean now.
Tom: Yes. I'm a good boy now.
Ms Smart: And thanks for your help, girls.
Amy and Lingling:
A. Thanks, Lingling.
B. What a good boy!
C. You' re welcome.
D. Tom is making a mess.
E. I know. Sorry.
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
