Nooneknowsexactlyhowtheearthbegan.However,accordingtoaw...

问题详情：

No one knows exactly how the earth began. However, according to a widely __61_(accept) theory, it bagan with a “Big Bang”. Then the earth exploded __62_ (loud) and produced water vapour and many gases, __63_ (make) the earth’ s atmosphere. And then as the earth cooled down, water appeared and stayed on the surface. It was the presence of water __64_ allowed the earth to dissolve harmful gases and acids into the oceans and seas, which made __65__ possible for life to develop. And the appearance of small plants encouraged the __66_ (develop) of early shellfish and all sorts of fish. Next, green plants began to grow on land. They were followed __67_ land animals. Later, reptiles appeared for the first time , after which dinosaurs developed. However,they suddenly __68_ (appeared). Therefore, mammals rose on the earth. Finally, humans appeared and spread all over the earth. However, they are putting too much carbon dioxide into the atmosphere, making the earth too hot to live on. So __69_ life will continue on the earth will depend on whether this problem can __70_ (solve).

【回答】

        61. but          spend        sion                  helped

66. better        ly         diately        ing        70.a

知识点：语法填空

题型：未分类