Are your trousers black?怎么回答

Are these your trousers?Yes,these are, Are these your trousers?怎么回答? Are your trousers black?怎么回答 what colour are your trousers?回答是： How much are your trousers?改为同义句 _____the _____ _____ your trousers? what's the price of your trousers?(改为同义句）___ ___ are your trousers? 改错Are there your trousers Yes ,there are How much are trousers?改为同义句 ____ ____ ____ ____ your trousers. How much are your trousers?改为同义句 What colour are your trousers?(同义句)苏教版Starter Unit10 怎样把colour are your What trousers连成一句话? your trousers are d——.you must wash them. Are these your trousers?Yes,these are.怎么修改错误的句子? Which are your trousers?Mine are the blue____.A.one B.ones C.it D.them your trousers _____dirty,you must have ____washeda.is；itb.are,itc.is.themd.are,them these trousers are ____. a.my b.your c.her d.his your trousers are dirty,you must have them washed是否正确麻烦附加讲解,OK? What color is your trousers?联系动词用is还是are?