Please call me.My phone number is 677-6879.（合并为一句) Please call ___ ___ 677-6879.

Please call me.My phone number is 677-6879.（合并为一句) Please call ___ ___ 677-6879.
This is my mother's ring.（改为一般疑问句) ___ ___ ___ mother's ring?That is his watch.(改为复数形式）___ ___ his ___.Are these your ID cards?(作否定回答）___,___ ___.