Nooneknowsexactlyhowtheearthbegan.Howeveraccordingtoawidely61(accept)theoryitbaganwitha“BigBang”.Thentheearthexploded62(loud)andproducedwatervapourandmanygases63(make)theearth’satmosphere.A

Question

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).

Answer 1

        61. but          62.to spend        63.decision         64.them         65.were helped

66. better        67.poorly         68.immediately        69.robbing        70.a