This pair of pants .为什么不用these

This pair of pants .为什么不用these this pair of pants is 20yuan.为什么用is? This pair of pants is().Can I()? This is a pair of pants.和they are pants. This pair of pants (be动词) Eric's. 英语在线改错This pair of pants are my favorite. this pair of pants ___ big and the pants there___ small.A,is a pair of brown pants This pair of glasses _____ me RMB 1,000.为什么用cost不用took What does he think of this pair of pants?同义句转换 I want this pair of pants.Can I ( ) A.try it on B.try them o 括号部分提问 His mother is (very well).This pair of pants is (fift