40．There is ________ in the world if you put your heart into it．

  A．nothing difficult                              B．something difficult

  C．difficult nothing                              D．difficult something

      41  knows how big the universe is．When we talk  42   the universe．we mean the earth，the sun，the moon and the stars．

    Now let me tell you something about our earth．The earth is a big ball．It turns round and round   43   space．  44   surface is covered by water and land．If you are in a spaceship and look  45  at the earth from space．you will see  46  clouds over the surface of the earth．Through the clouds you will see the blue colour of the oceans and seas．Almost two-thirds of the earth is covered with water．

    We live on the outside  47  of the earth．Around and above us is the air．The earth  48  twenty-four hours to turn all the way round-that is one day and one night．When your country is facing the sun，it is daytime for you．But as the earth turns you away from the sun，everything a round you grows  49   ．

    Can you tell me  50  more about the earth or the universe?

39．The King looked into the hall and found many people ________ there．

  A．dance                  B．dancing           C．are dancing     D．dances

38．Do you think the piece of dramatic opera him famous all over the country?

    A．took                B．made               C．turned             D．changed

37．There is nothing in my backpack，________?

    A．is it                 B．is there            C．isn’t it             D．isn’t  there

36．On his way home，he felt hungry，so he stopped ________ some food．

  A．to eat                  B．eating              C．eat                  D．ate

35． ________ the help of Project Hope，the poor boy has returned to school．

  A．Under                 B．For                 C．With               D．At

34．The film ________ for five minutes．

  A．began                 B．has begun        C．has been          D．has been on

33．Mr Black ________ China for many years．

  A．has been to          B．has gone to      C．has been in      D．has come to

32．They ________ thousands of buildings in the last few years．

  A．build                  B．built                C．will build         D．have built

31．Have the astronauts ________ life on Mars ？

  A．found                 B．found out         C．looked for        D．discovered