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（_____） 1. A. It has four. B. We have four. C. They have four.
（_____） 2. A. Be late for school. B. Pick flowers. C. Keep off the grass.
（_____） 3. A. Sure. Here you are. B. Yes. Help yourself. C. OK. Let's go.
（_____） 4. A. Yes, I do. B. No, I don't. C. Yes, I am.
（_____） 5. A. It's sixty-six yuan. B. It's cool. C. They are ninety yuan.
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
