46.　　 Mother told me to go shopping ______ her.

45.　　 English is very interesting. We are all interested _______ it.

44.　　 They are busy ______ their work now.

43.　　 I came to say good-bye _______ you.

42.　　 He went on ______ his work after a short rest.

41.　　 I have nothing _____ to tell you.

40.　　 Where _______ have you gone?

39.　　 What ______ do you want to buy?

38.　　 What do you think _______ Beijing?

37.　　 How do you _______ Beijing?