根据汉语提示，写出相应的单词。请在指定位置答题。

61.Floods in that country made thousands of people _____________ (无家可归的).

62. He gave no _____________ (解释) for what he was doing that evening.

63. The charge for _______________ (入场费) is 50 yuan for an adult.

64. Over the past half century, using _____________ (化学的) fertilizers has become very common in farming.

65. We should join hands to create a better learning ________________ (环境).

66. So far, Mr. Cook has not _____________ (评论) on these reports.

67. The city wall of Xi’an has been well ______________ (保存).

68. He told me the news in a _____________ (耳语).

69. As winter___________ (临近), the weather becomes colder.

70. In the early 1940s many young people joined the army to __________ (保卫)our country against the enemy.

61.___________62.___________63.__________64.__________65.___________

66.___________67.___________68.__________69.__________70.___________