50．____ turn is it now? 　　A．Who's B．Whose 　　C．Who 　D．Whom

49．Hello, Jim! Nice____ you! 　　A．see　B．seeing 　　C．sees D．to see

48．---- What colour is that hat? 　--____. 　　A．That's blue. B．It's a blue 　　C．It's blue　D．Its blue

47．---- Is this box heavy or light? --____. 　　A．Yes, it is　B．No, it isn't 　　C．It's light. D．Yes, it's heavy

46．Let me ____it. 　　A．to do B．do 　　C．do to D．do the

45．Tom is ____English boy. He's in ____Class Four, Grade Three. 　　A．an; the B．an; × 　　C．a; ×　 D．×; ×

44．I go to bed____9：15 in the evening. 　　A．in　B．at 　　C．under D．on

43．---- Who's that girl? 　---- She's ____. 　　A．my sister　B．ten 　　C．in red 　D．nice

42．How old ____? 　　A．are you mother B．are your mother 　　C．your mother is D．is your mother

41．The man is ____father. 　　A．Kate　B．Kate's 　　C．she's D．Kate's