请教一个英语问题属于哪个语法点为什么选这个答案,ontheoceanfloor.
Ontheoceanfloor.However,tobringthemtothesurfacerequiresexpensiveequipmentandtrainedpeople.
AdosomesunkenshipslieBsomesunkenshipsdolie
CliesomesunkenshipsDsomesunkenshipslie