题目内容
Do you think stones can move by themselves? There are some famous moving stones in Death Valley, the US. Many of the stones are small but a few of them are very big. Some of the big stones are as big as a man. The biggest stone weighs about 350kg.
The stones only move at night. Nobody has ever seen them moving, but now scientists know the answer to the question. The answer is the wind. When the wind comes from the west, the stones move to the east. When the wind is from the north, they always move to the south. But how can the wind move a very heavy stone?
Death Valley is one of the hottest places in the world, but it can be very cold at night. Sometimes, there are even bad storms （风暴） at night. Rain falls, and the wind is strong and cold. The water on the ground turns into ice easily. Then the strong wind can move the stones along the flat （平坦的）ground. In the morning, the sun comes up and dries the ground. So people can find them move from one place to another in the daytime.
( ) 57. When do the stones move in the Death Valley?
A. At night. B. During the day. C. All the day. D. Nobody knows.
( ) 58. If the wind comes from the northwest, the stones move to the ______.
A. west B. east C. southeast D. northwest
( ) 59. Sometimes there’s some ice on the ground in Death Valley because ______.
A. it’s one of the hottest places in the world B. there’s strong wind
C. rain falls and the wind is strong and cold D. it’s very high
( ) 60. Which of the following is TRUE in the passage?
A. Most stones in Death Valley are as big as a man.
B. At night, the strong wind can move the stones along the flat ground.
C. In Death Valley, it is hot during the day and at night.
D. The wind always comes from the west and the north.
ACCB
