Theuniversebeganwitha“BigBang”.Theearthwasjust61.cloudofdustafterthe“BigBang”.Theearthexplodedloudlywithfireandrock.62.wereintimetoproducemanythings，whichweretomaketheearth’satmos

Question

The universe began with a “Big Bang”. The earth was just 61._________cloud of dust after the “Big Bang”. The earth exploded loudly with fire and rock. 62._______ were in time to produce many things，which were to make the earth’s atmosphere. As the earth cooled down，water began to appear on 63.________ surface. It allowed the earth to dissolve 64.________ (harm) gases. Then life began to develop.

Small plants multiplied and 65._________ (fill) the first oceans and seas with oxygen. This encouraged the 66._________(develop) of early shellfish and fish. Land animals such 67._________ insects，reptiles and dinosaurs appeared after green plants appeared. Small clever animals spread all over the earth. They are putting too much carbon dioxide into the atmosphere which prevents heat from 68.__________ (escape) from the earth into space. So 69._________ life will continue on the earth for millions of years to come will depend on whether this problem can 70._________(solve)．

Answer 1

61. a     62. They     63. its / the      64. harmful      65. filled

66.development     67.as     68.escaping    69. whether    70.be solved