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（1）A. 15kg B. 15cm C.50kg
（2）A. clean B. climb C. climbed
（3）A. take B. tail C. took
（4）A. play football B. play the piano C. go by plane
（5）A. wash B. watch C. wear
（6）A. buy B. bike C. nine
（7）A. ski B. skate C. snake
（8）A. present B. parents C. pear
（9）A. I’m fine. B. I’m nine. C. I’m five.
（10）A. He’s sad. B. He’s sick. C. She’s thin.
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
