41.  We wondered how fish could live in such water.

42.  Those were such happy times and not so long ago.

43.  Recently in developing countries, We can find such a fact that health is much developing .

44.  Facing such fact, how should we do?

45.  People always think there is such a great number of fresh water that we can get constantly and the fresh water will not be used up for ever.

46.  Then facing such an important problem what should we do?

47.  Facing such serious problem, what should we do?

48.  Such practical activity and experience will makes us have a further understanding about the world.

49.  The college students ought to know the world outside the campus, such the college students can know about more knowledge.

50.  Such , I think that I can know about the world outside the campus.