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Mark Twain was a great American writer. He was very busy, and he often forgot things.
One day, he went to a city by train. He wanted to see one of his friends there. When he was on the train, the conductor(检票员) asked him for his ticket(票), but he couldn’t find the ticket. The conductor knew Mark Twain. She said, “Show me your ticket on your way back. If you can’t find it, it doesn’t matter.”
“Oh, it does,” said Mark Twain. “I must find the ticket. If I can’t find it, how can I know where I’m going?”
1．Mark Twain came from the USA.2．Mark Twain went to the city to visit an interesting place.
3．When he was in the train, the conductor asked him for his books.
4．Mark Twain didn’t show his ticket because he didn’t buy the ticket at all.
5．Mark Twain must find the ticket because he forgot where he was going.
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
