题目内容

Do you like go running? Some people think running is boring. But there are ways to make it more exciting – for example, “plogging”.

Plogging is a new exercise trend(趋势)from Sweden. The name comes from the words “pick up” and “jogging”. It means picking up trash(垃圾)while running.

Ploggers go outside with a pair of gloves and a trash bag. They stop to pick up trash as they run. Nobody likes to see trash while they’re doing exercise. This new trend brings environmental protection (环境保护) and healthy living together.

Plogging may even be better for you than just running, since bending down (弯腰) to pick up trash is another kind of exercise itself. So try plogging with your friends on your way to school. You can stay healthy and keep the environment clean at the same time.

1.What trend does this story talk about?

A. Making new words. B. Running with gloves.

C. Picking up trash while running. D. Throwing away trash in bags.

2.Where did the trend come from?

A. Switzerland. B. The United States. C. Sweden. D. Spain.

3.What is the best part of this new trend?

A. More people are wearing gloves while running.

B. Runners take their own bags, so there will be no trash.

C. It tells people to stop using public trash bags.

D. It’s good for the environment and people’s health.

4.The last paragraph (节) mainly tells us that _________.

A. bending down while plogging is also good exercise.

B. it is not important to keep the environment clean.

C. plogging gives you a chance to make friends.

D. you should run to school with your friends.

5.Which of the following is TRUE?

A. All people think running is boring.

B. Ploggers go out with only a pair of gloves.

C. Maybe plogging is better than running.

D. Plogging is the best sport.

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The rockets take astronauts and man-made satellites into space. The satellites are used for communication, weather monitoring and research. But how do satellites stay up without Falling down?

There are two opposite forces acting on the satellite. One of them is the force of gravitation(地心引力), which tries to pull the satellite toward the earth. The other force is created by the rotation (旋转)of the satellite around the earth. This force tries to take the satellite away from the earth. With these two forces, the satellite goes round and round. The gravitational pull of the earth is like a rope which keeps the satellite from flying away.

Everything that goes up has to come down. It is only a matter of time before a satellite comes back to the earth. As time goes by, the satellite loses its speed, which makes the gravitational pull stronger than the force pulling it away. This makes the satellite crash (坠落)down to the earth.

1.The force that pulls the satellite towards the earth is created by ________.

A. the earth B. the satellite itself

C. the rotation of the satellite D. the rope

2.Why can't the satellites fly away?

A. Because of the force from the earth.

B. Because the satellite is too big.

C. Because of the force created by the rotation of the satellite around the earth.

D. Because people on earth have made ropes to tie the satellites tightly.

3.Which of the following is TRUE according to the passage?

A. There are four forces acting on the satellite.

B. The force of gravitation makes the satellite go round and round.

C. As time goes by, the satellite will finally fall down.

D. The satellite will stay in space forever.

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