41.  The other is the words " further " and " farther' , I don't know the difference between the two words.

42.  Hunter knew that they was impostor because few people knew about the invention.

43.  He knew that they weren't the right men.

44.  After I had read this play I know .

45.  From making friends, I really know what the lift is.

46.  If you know the meaning of life, you must know how to live and how to make friends.

47.  I have a lot of storys want to tell every bady , but I know it is onlya dream.

48.  So I left her and I also knew I had hurt her.

49.  Do you know how many languages there are in the world?

50.  We know that we all learn our own language well when we were still children.