Read the passage carefully, then choose the correct answer.
There is one planet that still fascinates and teases scientists mainly because it doesn't have an atmosphere to obscure observation, yet it is not big enough for sufficiently accurate telescopic observation. The fact that it is also very close to the sun also makes it difficult for astronomers.
However, space telescopes have told us a lot more about Mercury. It is rather similar to Earth's moon and to Mars. There are mountainous areas dotted with craters and large valleys which are uncratered. The moon's valleys have fewer cracks and the ridges are smoother. Mercury's valleys are filled with volcanic rocks, similar to on the moon, yet there is no evidence of volcanoes, even extinct ones, on Mercury, as there is on the both Mars and the moon, and of course here on Earth.
So, scientists presume the valleys on Mercury were caused by different things, that is to say not by volcanoes, but by very large meteorites, which also caused the cracks in the terrain and left the ridges rough and uneven. More and better photos of Mercury are needed to prove what are at present at best only hypotheses.
What is true about Mercury but not true about the moon or Mars?
A.The valleys are filled with volcanic rocks.   
B.There are no volcanoes.
C.The valleys are uncratered       
D.There are hilly regions.

Choose the correct  answer to each of the following question.
They are trying _____ the house.
A.to tidying up 
B.to tidy up     
C.tidying up  
D.tidies up

 “How would you like your steak?” "_____"
A.Rare, please
B.Very good.
C.Not too bad
D.Yes, sir

Choose the correct  answer to each of the following question.
My mother is a _____ while his mother  is a _____.
A.homemaking/ breadwinner   
B.homemaker/ breadwinning
C. homemaker/ breadwinner         
D.homemakers/ breadwinners

Choose the correct  answer to each of the following question.
I think you like _____ the house every day.
A.to be swept     
B.to swept   
C.sweeping  
D.to sweeping

 She was so frightened that she was shaking like______
A.a leaf
B.jelly
C.the wind
D.a flag

It tasted so _____of the lemon that the other flavours were lost.
A.strongly
B.hardly
C.forcefully
D.fully

_____I love you, I can’t let you do whatever you like.
A. Whatever
B.Whether
C.Despite
D.Much as

It was ten years ago ______ Mr.Thang returned from America.
A.when
B.that
C.since
D.when that

Read the passage carefully, then choose the correct answer.
There is one planet that still fascinates and teases scientists mainly because it doesn't have an atmosphere to obscure observation, yet it is not big enough for sufficiently accurate telescopic observation. The fact that it is also very close to the sun also makes it difficult for astronomers.
However, space telescopes have told us a lot more about Mercury. It is rather similar to Earth's moon and to Mars. There are mountainous areas dotted with craters and large valleys which are uncratered. The moon's valleys have fewer cracks and the ridges are smoother. Mercury's valleys are filled with volcanic rocks, similar to on the moon, yet there is no evidence of volcanoes, even extinct ones, on Mercury, as there is on the both Mars and the moon, and of course here on Earth.
So, scientists presume the valleys on Mercury were caused by different things, that is to say not by volcanoes, but by very large meteorites, which also caused the cracks in the terrain and left the ridges rough and uneven. More and better photos of Mercury are needed to prove what are at present at best only hypotheses.
What can we infer from the passage that astronomers still need to get more detailed observation of Mercury?
A. Better and more space telescopes      
B.More hypotheses.
C.Larger space telescopes       
D.More ways to prove hypotheses.