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.
