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   Imagine taking a photo of an apple on the moon with your smartphone.It seems impossible，right？But that's what it was like for scientists to take a photo of a black hole in space.In face of so many challenges，scientists have finally got the first photo of a black hole.
   Black holes are one of the most mysterious things in the universe.
   Physicist Albert Einstein first explained black holes in 1915 with his general theory of relativity（廣義相對(duì)論）.
   According to Einstein's theory，a black hole comes from a dying star.The star falls into a small point with a lot of strong gravity.The strong gravity of the black hole allows it to pull other things in and"eat"them.Not even light can escape a black hole.
   The photo proves Einstein was right.It makes the general theory of relativity-one of the most important theories about the universe-more believable.
   Although they are mysterious，it is likely that black holes are actually quite common.Scientists believe that every large galaxy（星系） has a big black hole at its center- the one in our galaxy is called Sagittarius A.
   Scientists are continuing to study the black hole in the photo."One of the things I'm most interested in is seeing how these images might change over time，"said Gregory Sivakoff，one of the scientists who helped to capture the photo.According to him，studying the black hole might help us solve bigger puzzles about the universe.
（1）The underlined sentence in the first paragraph means

C

C

.
A．scientists like taking photos of the black hole in space.
B．It's impossible to take a photo of an apple in space.
C．taking a photo of the black hole in space also seems impossible.
D．taking a photo of an apple is like taking a photo of the black hole.
（2）What do you know about the black hole？

C

C

A．It is the most mysterious thing in the world.
B．Only our galaxy has the black hole at the center.
C．It was first talked about by Albert Einstein in 1915.
D．The photo makes people believe Einstein's every theory.
（3）Paragraph 3 is mainly about

A

A

.
A．Einstein's theory of the black hole.
B．the mass and gravity of the black hole.
C．why the black hole eats everything.
D．the black hole is from a dying star.
（4）Why will scientists continue to study the black hole？

B

B

A．It's amazing to see the image over times.
B．It helps us solve bigger puzzles about the universe.
C．It helps the scientists to capture the photo of the black hole.
D．It can help the scientists solve all the mysteries in the universe.