Ａ.根据语境或句意，用所给单词的正确形式填空。

51.In China .It is_____(polite) to stick your chopsticks into your food when you eat.

52.My teachers always encourage us _____(study) hard on different subjects.

53.Jenny brought two nice _____(picture) of her family to school yesterday.

54.The library is between the school and the hospital.You can find it____(easy).

55.While I ______(wait) for the bus at the bus stop, it began to rain.

B.根据所给单词填空。

56. It’s polite to keep our voice down in______________(公共场合).

57. ____________ (根据)to Chinese history, sky lanterns were first used by Zhuge Kongming.

58.Cheese is ___________(制造)from milk.

59.Kate’s grandparents have had a great___________(影响)on her.

60.It’s an important part of our _____________(发展）