41.  Two, I know the further and farther in meaning and use are same .

42.  "You are very brave."

43.  Most international business letters are written in English, too.

44.  (The flowers are opening two, each make clear one branch )

45.  Because around me all are girls .

46.  Now machines are widely used all over the world.

47.  Bicycles, cars, trains and planes are all machines.

48.  To much reading, poor lighting and to much TV watching are the main reasons.

49.  In my opinion, the TV programs in Xianggang are rich and varied.

50.  There are five bridges across the river.