55、We have four　　　　　　　　　 in the morning. (class)

54、His room is on the　　　　　　　　　 floor. (three)

53、I met　　　　　　　　　 on my way to school yesterday. (they)

52、Miss Gao is one of the most popular　　　　　　　　　 in the school. (teacher)

51、There are many beautiful　　　　　　　 in this picture. (flower)

50、March 8th is　　　　　　　　　　 Day. (woman)

49、This is my dictionary. 　　　　　　　　　 are over there. (she)

48、There are　　　　　　　　　 of workers in a factory. (hundred)

47、The　　　　　　　　　　 lesson is very difficult. (twenty)

46、She fell off the bike, and hurt both of her　　　　　　　　 . (foot)