Nooneknowsexactlyhowtheearthbegan.Each61(religious)andc...

问题详情：

No one knows exactly how the earth began. Each 61 (religious) and culture has its own ideas about how life began on earth. However,according to a widely accepted theory,the universe began with a “Big Bang”. It exploded 62 (violent) with fire and rock. They were in time to produce carbon dioxide,nitrogen,water vapour and other gases. Water had also appeared on other planets like Mars 63 it had disappeared later. 64 many scientists believe is that the continued presence of water allowed the earth to dissolve 65 (harm) gases and acids into the oceans,which made it possible for life 66 (develop). Many millions of years later,the first extremely small plants 67 (multiply) and tilled the oceans and seas with oxygen. Later when the plants grew into forests,reptiles appeared for the first time. They produced young generally by 68 (lay) eggs. After that,some huge animals，69 (call) dinosaurs,developed. However, 65 million years ago the age of the dinosaurs ended. These disappearance made possible the rise of mammals on die earth. These animals where different from all life forms in the past,because they gave birth 70 young baby animals and produced milk to feed them.

【回答】

61. religion          61. violently         63. but          64. What              65. harmful

66. to develop     67. multiplied              68. laying             69. called             70. to

知识点：语法填空

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