21.  A washing machine helps us to wash clothes quickly.

22.  A printing machine helps us to print a lot of books, newspapers magazines and many other things quickly.

23.  They help us to travel faster than on foot .

24.  It is also helpful for us to improve our spoken English.

25.  But, that day,teacher tell us .

26.  English is very inportant for us.

27.  When you require us .

28.  This is very good for us.

29.  The end , I very hope you can give plent of advice to us.

30.  It will bring some question for us.