雅思口语 量词都不会用怎么冲鸭？

1 a stack of 一堆

I signed a stack of papers. 我签了一堆的文件。

2 a slab of 一块厚厚的

And was just putting a slab of fruitcake on a plate when there was a loud knock on the door.

正要把一块厚厚的水果蛋糕放在一只盘子里，就在这时，传来了很响的敲门声。

3 a speck of 一点

Very latest model. Only came out last month, said Flintcarelessly, flicking a speck of dust from the end of his own.

最新型号，上个月刚出来的，弗林特毫不在意地说，轻轻掸去他那把扫帚顶上的一点灰尘。

4 a patch of 一小块土地

In the small vegetable patch behind Hagrid'shouse were a dozen of the largest pumpkins Harry had everseen.
小屋后面的菜地里，结了十二个大南瓜。哈利从来没见过这么大的南瓜。

5 a pile of 一叠

He had even signed a few of them. Another large pile lay on his desk.
有几张上甚至还有他的签名。桌上也放着一大叠照片。