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One day, Bob took two of his friends into the mountains. They put up their tents（帐篷）and then they rode horses to a forest to see the trees.
In the afternoon, it started to snow. More and more snow fell. They wanted to go back to the camp. But Bob could not find the way. There was snow everywhere. Everything was the same. How could he take his friends back to the camp? Bob had an idea. The horses! Let the horses take them back!
It was getting late. They rode on（一直骑）and on. At last the horses stopped. Where were they? None of them could tell. John looked around（环顾四周）. What was that under the tree? It was one of their tents!
1．How did they go to the forest? ( )| A．On foot. | B．By horse. | C．By bike. |
| A．Yes, it is. | B．No, there wasn't. | C．Yes, it was. |
| A．One. | B．Two. | C．Three. |
| A．naughty | B．clever | C．big and white |
| A．Yes, they did. | B．No, they didn't. | C．We don't know. |
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
