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19.What can the first 50 visitors of each day get
A.A free coin.
B.A discount on the ticket.
C.A map of the exhibition hall.
D.A free coin collection album.
20.What is the kind of the text
A.A trip guide.
B.A dairy.
C.An advertisement.
D.An e-mail.
B
Did you hear the news When Shenzhou-20 was ready to come home,a tiny
piece of space junk(太空垃圾)hit it!Luckily,,the astronauts came back safely,but it
made people think about a big problem---space junk.
Lo you know what is space junk Space junk is all the rubbish that humans have
left in space.This includes old satellites(卫星)，used rocket(火箭)parts,and even tiny
pieces from crashes().For example,in 2009,two satellites hit each other far
above Earth.That resulted in thousands of space junk pieces!Astronauts also lose
small things in space sometimes.When we started exploring space,we started making
space junk.
Space junk is a growing problem.It flies around Earth very,very fast---about
20,000 km per hour!As a result,even a small piece can damage a spacecraft().
There are over 36,000 big pieces and millions of smaller ones moving around our
planet.More junk means a higher chance of crashes,creating even more junk.
It is important for all of us to know the danger of space junk and work together
to keep space safe.Scientists are thinking of ways to clean it up.After all,space is
valuable for everyone on Earth.By working together,we can solve this problem and
continue our exciting space journey.
21.What happened before Shenzhou-20 returned home
A.It crashed into a satellite.
B.A piece of space junk hit it.
C.The weather conditions were terrible
D.It received a message from outer space.
八年级英语试卷第4页（共10页）

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