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1. He __________(work) in that hospital four years ago.
2. Why __________ your brother __________(cry) last night?
3. I __________(see) him yesterday.
4. He __________(come) to school at 6 o’clock this morning.
5. The boy __________(have) a bad cold yesterday.
6. When __________ you __________(buy) that house?
7. He __________(tell) a story to his daughter yesterday.
8. __________ you __________(try) to call me last night?
9. What __________you __________(buy) in the shop?
10. I __________(buy) a coat just now.
11. She __________(paint) the wall last month.
12. My mother __________(be) a worker 20 years ago.
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
