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This afternoon, I got on a bus and sat at the back of the bus. Five minutes later, the bus stopped and seven or eight people got off(下车). Suddenly I saw a wallet(钱包) under my seat. I picked it up and asked the bus driver (司机) to help me find its owner (失主) . I asked all the people on the bus, but they said it wasn’t theirs. Suddenly an old man got on the bus again and asked about the wallet. He looked very worried. At that moment I knew he was the owner. I gave the wallet back to him, and he thanked me again and again.
1．The story happened on a bus in the afternoon.2．At the bus stop, seven or eight people got on the bus.
3．I saw a wallet under my seat.
4．I picked up the wallet and went home.
5．The old man thanked me for returning (归还) the wallet.
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
