It looks like a really big pan.It can see faraway stars in space；It is China's "Sky Eye".This is the Five-hundred-meter Aperture Spherical Radio Telescope （FAST，500米口徑球面射電望遠鏡）.As the largest radio telescope in the world，it is as big as 30 soccer fields!
   One of its jobs is to find pulsars（脈沖星）.People call pulsars the "GPS of space".On the Earth，you use GPS to find different places.What if you travel to the moon or mars？You can use pulsars to find your way back to the Earth.
   It also helps scientists look for life in space.FAST is about 2.5 times as sensitive（靈敏的）as the second-largest telescope in the world.It can "see" things some 13.7 billion light-years away.If you make a phone call on the moon，it can pick up the signal very clearly.
   China opened FAST to the whole world on March 31.About 10 percent of FAST's observation（觀察）time，around 450 hours a year，is being given to scientists from other countries.Scientists can apply online to use it. "Sky Eye" has changed from "China's eye" to "the world's eye".

（1）What do we know about the "Sky Eye"？

B

B

A．It is a big pan in space.
B．It is the world's largest radio telescope.
C．It looks like a soccer field.
D．It is the world's first large telescope.
（2）What can you use pulsars to do？

D

D

A．Find more stars.
B．Travel to the moon.
C．Make GPS easier to use.
D．Find your way back to the Earth.
（3）How can FAST help us find life in space？

B

B

A．By working with other telescopes.
B．By picking up signals.
C．By making phone calls.
D．By traveling to unseen places.
（4）What does the last paragraph tell us？

C

C

A．China will use 10 percent of Sky Eye.
B．China makes a lot of money with Sky Eye.
C．China has opened Sky Eye to the world.
D．China will give Sky Eye to foreign scientists.
（5）Which is the best title of this passage？

C

C

A．Why we do research on life in outer space.
B．How to find pulsars in space.
C．What FAST is and how it will be used.
D．How many telescopes China has.