These men are policemen.【改为单数句子】

These men are policemen.【改为单数句子】 these men doctors are very kind.改为单数句子 1.These are men.（变单数句子） These are my photos.改为单数句子 these are our apples改为单数句子 are these men doctors 单数句 the men do not answer与these men are not policemen ,为什么一个用the These firemen are very helpful.(改为单数句子） These are our sheep. （改为单数句子） These are old chairs(改为单数句子） What are these?They are apples.(改为单数句子)That's a bus.(改为复数句子) these are new books.改为单数形式