（These three) pieces of luggage is yours.用is对吗?还是用are.为什么?并且就画括号的提问?

(These three pieces )are your luggage .就画括号提问 three pieces of clothes （These three) pieces of luggage is yours.用is对吗?还是用are.为什么?并且就画括号的提问? Randomly cut a line segment into three pieces.What is the probability that these three pieces can form a triangle?随机地将一直线段分成三段.这三段可以形成三角形的概率为多大？ （These three) pieces of luggage is yours.用is对吗?还是用are.为什么?并且就画括号的提问.用how many提问 为什么three pieces of bread不对呢 Jack's friend gave him three pieces of advice.（对three pieces of进行提问）Jack's friend gave him three pieces of advice.（对three pieces of进行提问） Three pieces of bread _____ (be) on the table. There --------- three pieces of meat .到底填 is 还是are 英语：you will hear three pieces of recorded material 2 he give me three pieces of paper改被动 three pieces of paper_ _ _ me by him （These three) pieces of luggage is yours.用is对吗?还是用are.为什么?并且就画括号的提问luggage不可数 ,再多也还是单数 iswhich pieces of luggage is yours?回答者：CICI010203 - 经理 五级 2009-7-5 15:06感谢语或评 These three thin youths think of math . three these th发音相同吗 These three thin youths think of math THese potaoes are three yuan a kilo 1、These children come from three (country). I like these three songs thanks baby