73. We demanded more ______________ (多样化) in our food．

72. A satellite is one of the most expensive pieces of____________(科学) equipment.

71. Einstein was greatly___________(尊重) as the leading scientist of the century.

70. He has bought some f _________　 　for his new house.

69. He has some r　 _________ 　in this city and he¢ll visit them.

68. He 　f　_________　 　the rope to the tree and went away.

67. They set up an o　 ________ for sending telephone signals by satellite.

66. Satellites for b　 _________ 　are used to send radio and TV programmes.