in the lake和on the lake

in the lake和on the lake in the sea 和on the lake in the lake 与 on the lake 什么差别? the fish_____ in the lake boat on the Kunming Lake on the lake与by the lake有何不同? keep fish in the lake the west lake和west lake的区别 lake the swimmihg ducks in are the There are many boats on the lake Are they (skate)on the lake? There are many boats on the lake .