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（1）A: _________ are you doing ? B: I’m _________ pictures .
（2）A: _______ you want to go to the park ? B: Yes , I _______ .
（3）A: ________ I speak to your brother , please ?
B: ________ . Please hold on .
（4）A: ________ is she doing ? B: ________ walking .
（5）A: Look at the elephant . What is ______ doing ?
B: _______ running .
（6）A: What _______ the pandas doing ?
B: _________ climbing .
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
