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（1）A. I went to the bookstore.
B. I bought some books.
C. I bought some shoes.
（2）A. She sees elephants.
B. She saw elephants.
C. She’s going to see elephants.
（3）A. Yes, I did.
B. Yes, I do.
C. Yes, I am.
（4）A. No, she doesn’t.
B. No, she didn’t.
C. No, I didn’t.
（5）A. She’s angry.
B. She’s taller.
C. She’s gong to the hospital.
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
