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Today is Sunday! On Sundays, I usually play the flute (笛子), My father usually reads the newspaper. My mother usually cleans the house. But today my mother is in bed. She is ill. My father has to do the housework. Now, he is cleaning the house. “Sam, can you help me?” “Yes, Dad!” Now, we’re washing the car. Where is my sister, Amy? She is playing my flute. What a lucky girl!
1．I’m playing the flute now. （______）2．My mother is cleaning the house now. （______）
3．I’m helping my mother wash the car. （______）
4．Amy isn’t doing the housework. （______）
5．Father isn’t lucky today. （______）
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
