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| A．What were they? |
| B．I didn't come back till August 20th |
| C．What did you see there? |
| D．I went to my uncle's farm |
| E．What did you do there? |
John: 1．
Amy: 2．
John: I saw a lot of animals on the farm.
Amy: 3．
John: Sheep, pigs, cows, rabbits, chickens and so on.
Amy: 4．
John: I helped my uncle feed them and took lots of pictures there.
Amy: When did you leave farm?
John: 5．
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
