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Today is Saturday. It’s a nice day. Some students are in the nature park. Ann is drawing pictures. Lily is playing with Lucy. Please work quietly. Mike is listening to music. Zhang Peng and John are flying kites. Amy and Chen Jie are eating cakes. Oh, please keep the ground clean. Wu Binbin and Robin are speaking English. They’re talking quietly. Some boys are playing the toys. Miss White tells them to take turns. They’re having a good time.
1．Ann is drawing pictures.2．Lily is playing with Mike.
3．Amy and Chen Jie should (应该) keep the ground clean.
4．Wu Binbin and Robin are talking quietly.
5．Some boys should take turns to play the toys.
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
