The dog swam ___ the river.A.cross B.on C.through D.across

问题描述:

The dog swam ___ the river.A.cross B.on C.through D.across

答案:D
这里还缺一个介词,而A是动词,首先排除.across指“越过”,through 指是的“从中间或者内部穿过”.