她的桌子上有一大堆文件。
There was ___a ___mass ___of paperwork on her desk.
秋天,树木变成了一大片鲜艳的色彩。
In the fall, the trees become ___a ___mass ___of vibrant color.
在大风天后,她的头发变成了一团缠结的卷发。
Her hair was ___a ___mass ___of tangled curls after the windy day.