a sunbox is a big light改为复数

this is a big strawberry.（改为复数） This is a big school.改为复数句 This is a big family.改为复数句,请速回! there is a big tree in front of the house改为复数句 he has a big family 改为复数形式 she runs a big business.(改为复数句) has it got a big trunk?改为复数句 what a big apple is!复数怎么变,how big the apple is!的复数 this egg is big 改为复数 This is big factory.(改为复数) this bus is very big. 改为复数 This hat is big.改为复数句