______ the earth to be flat, manyfeared that Columbus would

__ The earth to be flat,many feared that Columbus would fall _____ the earth to be flat,many feared that Columbus would f believing the earth to be flat,many feared that 中to be flat在 应该说Used it to be thought that the earth was flat吧 Columbus proved that the earth _________ round? The idea that earth is flat was ________centuries ago. long ago people b___ that the earth was flat Long ago,people____（believe)that the earth was flat. Many feared that Columbus would fall off the edge of the ear If the sun were to disappear,what would the earth be like?中d ______ that the earth is round. that would be all to the good.中文怎么说?