49．________ those maps? No，they ________ not. They ________ pictures.

48．He ________ my friend. ________ your friend a boy or a girl?

47．She ________ eleven. How old ________ that boy?

46．Those ________ their apples. Where ________ his apples?

45．________ these her English books?

44．I ________ in Class Three. ________ you in Class Three，too?

43．This ________ his ruler. Where ________ my ruler?

42．What ________ those? ________ they birds?

41．Excuse me! ________ this your eraser?

40．Those are school things.