89.　 There is a new p_________ house next to the post office.

88.　 This new rose is a d_________ of a very old kind of rose.

87.　 She has got a very scientific m_________ of dealing with political problems.

86.　 His interest in this subject g_________ decreases.

85.　 There was a shortage of _________(氧) at the top of the mountains.

84.　 I feel easy in such a harmonious ___(氛围) in my class that I have made progress in my study.

83.　 It’s reported that on the _______(表面) of Mars astronomers have got the evidence of water.

82.　 Because of the pull of g_________, anything which is thrown up will fall towards the earth.

81.　 According to the religion, ideas about the beginning of the u__________ do not agree with the theory of “Big Bang”.

80.　 Most people think that the social s____________ needs to be improved.