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（____）1. (A) Who(B) is (C) they? ________
（____）2. (A)They (B)are my (C)grandparent. ________
（____）3. (A)They (B)were (C)youg then. ________
（____）4. (A)Your (B)hairs (C)was short. ________
（____）5. You(A)was (B)so (C)naughty. ________
（____）6. (A)I (B)were (C)fat then. ________
（____）7. She(A)isn’t (B)tall (C)then. ________
（____）8. —(A)Was Lingling(B)cute? —Yes, (C)he was. ________
（____）9. (A)Two red (B)hen (C)were very old. ________
（____）10. (A)They (B)weren’t (C)old then. ________
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
