叶子漂浮在水面上。

Leaves were ___floating on the surface.

我们花了一个慵懒的下午沿着河流向下漂浮。

We spent a lazy afternoon ___floating down the river.

他把瓶子扔进海浪中，看着它漂浮出海。

He tossed the bottle into the waves and watched it ___float out to sea.