We can swim across the big River.为什么不用through

1、Can you swim （ ） the river A.through B.across C.to D.betwe swim ( ) the river 是填across还是through? I can swim across the river.为什么用across而不是cross? Did you swim across the river last week?为什么不用现在完成时? same and I can swim across the river It is easy for him to swim ___(through,across) the river. swim across the river还是swim cross the river? We went swimming in the river,这句为什么swim不用过去式呀? Go across the bridge above the river 怎么不用through和over呢 they (both can) swim across the river,（）中为啥需填both can? Can we swim in the river?No,you_____ The river is very wide.None of us ( ) swim across it .A.can