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| A. Thank you. B. I like watching the flowers growing. C. He is working in the study. D. Yes, l do. E. She is doing her homework. F. Because the ladybirds are eating his grapes. G. Yes. They look nice. H. Yes, he is. I. They’re eating Bobby's grapes. J. They’re playing in the playground. |
1．What is Helen doing?
2．Is he sweeping the floor?
3．Look! My grapes are big and purple.
4．What are the bad ladybirds doing?
5．We can help you!
6．What are the children doing?
7．Where is Tim’s father?
8．What do you like doing?
9．Do you like helping your parents?
10．Why is Bobby so sad?
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
