1. Last Sunday afernoon, I was in a bookshop. I wanted to buy a book about flowers.
2. Suddenly I saw a short man behind me. He stole my purse and ran out of the shop.
3. I followed him along the street, but he ran faster than me. I shouted, “Stop thief! Stop thief! ”
4. A policeman came to help. Then a woman came and told us, “I saw him. He ran along the street and turned left at the first crossing. ”
5. The policeman started to run. He ran faster than the thief. Soon he stopped the thief and I got my purse back.






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

