79. The books _______ belong to Mr. Smith.

　　 A. which is on the table　　　　　　　　 B. lying on the table

　　 C. are on the table　　　　　　　　　　　　 D. which on the table

78. How little Franz regretted the days ______ playing in the woods and fields.

　　 A. which wasted　　 B. wasted　　　　　　　 C. having wasted　　　　　 D. which is wasted

77. ―Who are those people walking along the street with banners?

―A group _______ itself the League for Global Environment Protection.

A. calling　　　　　 B. called　　　　 C. being called　　　　　　　 D. is called

76. ______ you return those books to the library immediately, you will have to pay a fine.

A. Until　　　　　　 B. Unless　　　　 C. If　　　　　　　　　　　　　　 D. Provided

75. 　Human be haviour is mostly a product of learning, ____ the behavior of animals depends mainly on instinct.

A. whereas　　　　　　　 B. so　　　　　　　　　　 C. unless　　　　　　　 D. that

74. ____ I saw her, I remembered to give Marie the money I owed her.

A. While　　　　　　　　　 B. Immediately　　　 C. Suddenly　　　　　　　　　 D. Momentarily

73. _____ human beings live in great numbers, the waters are very likely to become contaminated.

A. That　　　　　　　　　　 B. Where　　　　 C. Even if　　　　　　　　　　 D. Though

72. It was found that although the girl could perceive things with her fingers, this ability ceased _____ her hands were wet.

A. the moment when　　　　 B. the moment　　 C. in that moment　　　　　 D. before

71. It will not be long _____man can harness the solar energy and make it serve mankind.

A. since　　　　　　　　　 B. before　　　　 C. when　　　　　　　　　　　 D. after

70. Substances will expand or contract ______ heated or cooled, but this is not the case with water.

A. when they will be　 　　　　　　　　　 B. if they will be　

C. as they being　 　　　　　　　　　　　　 D. when