Dangerous junk

On Nov 16, seven astronauts on the International Space Station (ISS) woke up to an alarm. A Russian missile (导弹) test had just blasted (炸毁) a satellite (卫星) into more than 1,500 pieces of space debris (残骸) . Some got very close to the ISS.

NASA says space debris like this can travel at more than 28,000 km/h. That’s much faster than a bullet (子弹) (about 3,500 km/h). Even a pea-sized piece of debris could “wipe out” a space station or kill an astronaut if he or she is doing a spacewalk, says Live Science.

Since the 1950s, humans have sent thousands of rockets and satellites into space. Many are still there, and we now face an ever-increasing risk of space junk.

In 2006, for example, National Geographic reported that a tiny piece of space junk hit the ISS, taking a chip (一小块) out of a window. In June of this year, a piece of debris ran into one of the station’s robotic arms and left a hole.

Scientists are trying different ways to deal with the problem. One way is to use a huge net.

In 2018, the UK’s Surrey Space Center caught some space junk with a net in an experiment. It first found the debris, and then collected it with a net and a harpoon (鱼叉) .

Another solution is to use robotic arms. ClearSpace 1, the European Space Agency’s mission (任务) to clean space junk, is going to be sent into space in 2025. It will use robotic arms to catch debris. The mission plans to throw the debris into Earth’s atmosphere (大气层) , where it will burn up as it falls because of intense friction (摩擦) .

根据短文内容，选择最佳选项，并在答题卡上将选定答案的字母标号涂黑。
【小题1】The blast of the Russian satellite shows us ________.

A．what dangers the ISS is facing	B．why space experiments are exciting
C．why space debris is hard to clean	D．where space debris can come from

【小题2】According to NASA, space debris moves ________ as fast as a bullet.

A．six times

B．seven times

C．eight times

D．nine times

【小题3】According to Paragraph 2, what happens to a space station if it gets “wiped out”?

A．It gets cleaned.

B．It gets broken.

C．It gets old.

D．It gets rebuilt.

【小题4】What can we infer from Paragraphs 3-4?

A．Old rockets and satellites are turning into junk.

B．There is nothing we can do to deal with space debris.

C．The danger astronauts face is beyond our imaginations.

D．More and more missions are failing because of space debris.

【小题5】According to the story, the best way(s) to deal with space debris is ________.
a. collecting it with nets and harpoons       b. throwing it away into the galaxy (银河系)
c. throwing it into Earth’s atmosphere to burn up       d. throwing it into the sun to burn up

A．ab

B．ac

C．abc

D．bcd