a piece of 哪些

I was hurt by a piece of falling masonry.
我被掉下来的一块建筑用石块砸伤.
The teacher gave each of us a piece of filter paper before doing the experiment.
做试验前,老师给我们每个人发了一张滤纸.
He found a piece of fossil of an ancient bird.
他发现一块古代鸟类的化石.
The old man wore an eyeglass attached to a piece of ribbon.
那老人戴著单片眼镜,上面连结著一条丝带.
She wiped off the sweat from her face with a piece of facial tissue.
她用一张面巾纸擦掉脸上的汗水.
The baby was given a piece of candy.
这孩子拿到了一块糖.
big piece of cloth on the mast of a boat to catch the wind and move the boat forward.挂在帆船的桅杆上的大块的布可以捕捉风于是推动船只前进.