_____ the earth to be flat,many feared that Columbus would f

_____ the earth to be flat,many feared that Columbus would f __ The earth to be flat,many feared that Columbus would fall believing the earth to be flat,many feared that 中to be flat在 Many feared that Columbus would fall off the edge of the ear 应该说Used it to be thought that the earth was flat吧 Columbus proved that the earth _________ round? 1._____ used to be thought that the earth was square. 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. We _____ that you would be able to visit us. I feared that the shopkeeper would change her mind__.A.or th