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My family are all at home. Look! My mother is cooking lunch. My father is watching TV. My sister is drawing a picture in the study. Where's my grandfather? Oh, he is reading a book in his bedroom. What am I doing? Haha, I'm writing a letter to my friend. Look, who is playing with the ball? Oh, it is my lovely cat.
1．My father is sleeping. （2．My mother is cooking dinner now. （
3．My grandfather is reading a book. （
4．My sister is playing games with the cat. （
5．I'm writing a letter to my friend. （
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
