But already people have made great discoveries and have done exciting things. They have walked in space，visited the moon，and lived in space laboratories for long periods of time. Some scientists are now working on ways to make it possible for people to live on other planets. They are trying to solve problems of living in space，even though they don’t yet know what all of the problems will be. For example, they don’t yet know what problems people would have if they loved being weightless for several years. If you were a space traveler you might have to spend several months, or even years, in a spaceship. While you were in the ship you wouldn’t live as you usually do. You might have to find new ways to spend your time. Your body would have to adjust to different conditions. And you would have some problems that you never think about here on Earth. For example，you would have to have a huge supply of food with you because you can’t go to the supermarket when you’re halfway to another planet. You also would need fresh water and a way to get rid of waste. In fact, there would be many problems to solve in order to live in space.This passage tells us that______.A.if you were a space traveler, you had to live in space for some timeB.scientists are trying to solve problems of living in spaceC.while you were in the ship you wouldn’t live as you usually doD.scientists are finding ways to make people live on other planetsThe sentence “what problems people would have if they loved being weightless” (Line 6，Para. 1) is probably closest in meaning to_______.E.people who were light had many problemsF.many people who loved to be very lightG.many problems people would face in spaceH.weightless people who loved to have problemsThe phrase “a huge supply of food"(Line 5，Para. 2) means______.I.a large amount of foodJ.a huge piece of foodK.the food that is largely supplied on the marketL.the food at the supermarketWhile you were in the spaceship, you would NOT___________.M.need fresh water and a way to get rid of wasteN.have some unusual problemsO.go to the supermarket when you were halfway to another planetP.find new ways to spend your timeIt can be concluded from the passage that________.Q.life in space was interesting and excitingR.there would be many problems if you wanted to live in spaceS.if you were a space traveler, you had to stay in spaceT.it was easy to enjoy oneself in space

The age of space science began less than thirty years ago. But already people have made great discoveries and have done exciting things. They have walked in space，visited the moon，and lived in space laboratories for long periods of time. Some scientists are now working on ways to make it possible for people to live on other planets. They are trying to solve problems of living in space，even though they don’t yet know what all of the problems will be.   For example, they don’t yet know what problems people would have if they loved being weightless for several years.      If you were a space traveler you might have to spend several months, or even years, in a spaceship. While you were in the ship you wouldn’t live as you usually do. You might have to find new ways to spend your time. Your body would have to adjust to different conditions. And you would have some problems that you never think about here on Earth. For example，you would have to have a huge supply of food with you because you can’t go to the supermarket when you’re halfway to another planet. You also would need fresh water and a way to get rid of waste. In fact, there would be many problems to solve in order to live in space.This passage tells us that______.

• A.if you were a space traveler, you had to live in space for some time
• B.scientists are trying to solve problems of living in space
• C.while you were in the ship you wouldn’t live as you usually do
• D.scientists are finding ways to make people live on other planetsThe sentence “what problems people would have if they loved being weightless” (Line 6，Para. 1) is probably closest in meaning to_______.
• E.people who were light had many problems
• F.many people who loved to be very light
• G.many problems people would face in space
• H.weightless people who loved to have problemsThe phrase “a huge supply of food"(Line 5，Para. 2) means______.
• I.a large amount of food
• J.a huge piece of food
• K.the food that is largely supplied on the market
• L.the food at the supermarketWhile you were in the spaceship, you would NOT___________.
• M.need fresh water and a way to get rid of waste
• N.have some unusual problems
• O.go to the supermarket when you were halfway to another planet
• P.find new ways to spend your timeIt can be concluded from the passage that________.
• Q.life in space was interesting and exciting
• R.there would be many problems if you wanted to live in space
• S.if you were a space traveler, you had to stay in space
• T.it was easy to enjoy oneself in space