51.　　 --Excuse me, where's the post office ?

--Sorry, I don't know.

--______ .

A. It doesn’t matter　 B. All right　

C. Thank you all the same　 D. Don't worry

50.　　 The boy was very interested _______ English.

A. at　 B. in　　 C. to　 D. on

49.　　 I don't know ______ .

A. where does Jim live　 B. where did Jim live　

C. where Jim lives　　　 D. where is Jim live

48.　　 Two months _____ quite long for me . I can't wait.

A. is　 B. are　 C. were　 D. is going to be

47.　　 There is little water in the glass, _______ ?

A. isn't there　 B. is it　 C. is there　 D. wasn't there.

46.　　 On my way home I saw a dog _______ on the ground.

A. lying　 B. lies　 C. lied　 D. to lie

45.　　 Computers are the second most useful ____ of the world.

A. inventions　 B. inventors　 C. invention　 D. inventor

44.　　 He has two kites, one is big, ______ is small.

A. the other　 B. another　 C. other　　 D. others

43.　　 Kate says that she _______ a message on the desk.

A. will leave　　 B. leave　　 C. will give　　 D . give

42.　　 A farmer arrived _______ a women's house.

A. in　 B. at　　 C. to　 D. for