他重重地把书包扔在沙发上。

He ___plunked his backpack down on the sofa.

她懒洋洋地坐在阳台上拨弄着尤克里里。

She sat on the balcony ___strumming her ukulele lazily.

硬币从口袋里掉出来，啪嗒一声落在地板上。

The coin ___plunked onto the floor after falling out of the pocket.

他在逛街时随手花了一大笔钱买了一双昂贵的鞋子。

He ___plunked down a large sum on an expensive pair of shoes while window shopping.