根据下列各句句意和空白之后的汉语提示词，在答题卡指定区域的横线上写出对应单词的正确形式，每空只写一词。

66. __________ （天文学）is scientific study of the sun, moon, stars, planets, etc.

67. A week ago, father bought a Christmas tree ________ （装饰）with coloured lights.

68. Some books are to be tasted, others to be swallowed, and some few to be _______

（咀嚼）and digested. 

69. A great celebration was held on his _________(50岁)birthday.

70. The news he __________ (传播) around the town was not true.

71.   In fact, China is a_________（多山的）country.

72. At that time in the southern states, blacks were not treated as equal ________(公民) in the USA.

73. Though golf has more than 100 years of history in South Korea, it was only in the 1990s that it became popular __________ (全国范围).    

74. The man is carrying a heavy bag, __________ (重量达..) about thirty kilos.

75. Mike’s family used to live in a __________(欧洲的) country.