What colour are they?改为单数句

What colour are they?改为单数句 what are they?they are apples改为单数句 they,what,are,colour连词成句 what are they doing?They 're play with yo-yos改为单数句 they are orange sweaters 改为单数句 They are American teachers(改为单数句) Are they women doctors? 改为单数句 They are my friends.改为单数句 They are old jeeps. (改为单数句) 把They are apples.改为单数句 Are they students?（改为单数句） They are English jeeps.改为单数句