a piece of的用法和样例：
- Would you please give me a piece of paper?
- I was hurt by a piece of falling masonry.
- The teacher gave each of us a piece of filter paper before doing the experiment.
- He found a piece of fossil of an ancient bird.
- Please pass me a piece of paper handkerchief.
- The old man wore an eyeglass attached to a piece of ribbon.
- She wiped off the sweat from her face with a piece of facial tissue.
- The baby was given a piece of candy.
a piece of的相关资料：