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1. They are doing housework. (改成一般疑问句)
______ they ______ housework?
2．Are the students cleaning the classroom? (作肯定和否定回答)
Yes, ______ _______.
No, _______ _________.
3．I’m playing the football in the playground. (对划线部分进行提问)
_______ _______you ______ the football?
4．Tom is reading books in his study. (对划线部分进行提问)
________ ______ Tom _______ in his study?
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
