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I am Jack Brown. I’m an American boy from New York. I study in Jinling Primary School now. My father is an engineer（工程师）. My mother is a maths teacher. I have many friends in China.
My favourite festival is Christmas Day. Last Christmas Day, I opened the presents under the Christmas tree. Dad gave me a telescope（望远镜）. That is my favourite present. And I got a calculator（计算器）from my mum. From my grandpa and grandma, I got some stamps and a yo-yo. And we had a good time that day.
1．Jack is an American boy.2．Mr. and Mrs. Brown are teachers.
3．Jack doesn’t have any friends in China.
4．Jack’s favourite present is the yo-yo.
5．They had a good time last Christmas Day.
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
