根据课文填空
Water had also appeared on other planets like Mars but, 1 the earth,it had 2 later. It was not immediately obvious 3 water was to be 4 to the development of life. 5 many scientists believe is that the continued 6 of water allowed the earth to dissolve 7 gases and acids into the oceans and seas. This produced a 8 reaction, 9 made 10 possible for life to develop.
网友回答
解析：【小题1】unlike 句意为“水已经出现在其他的行球上，比如像火星，但不像地球一样。”unlike 不像
【小题2】disappeared 句意为“他稍后就消失了”had disappeared 完成时
【小题3】that “it is obvious that ”明显地 。。。 It 形式主语。 真正的主语为that 从句
【小题4】fundamental 句意为 “水是生命发展的基础”fundamental 基础的，基本的
【小题5】what 主语从句少believe 的宾语用what “很多科学家认为的是。。。”
【小题6】presence “水的持续出现”出现，呈现presence 名词
【小题7】harmful dissolve 。。。Into 溶解“把有害的气体和酸溶解为。。。”
【小题8】chain “一个反应链”
【小题9】which 非限制性定语从句，少主语， 指代物用which
【小题10】it make it possible使。。。成为可能， it形式宾语。