句型转换Mrs.Black is her mother .(改为同义词)_____is Mrs.Black's_
句型转换 Mrs.Black is her mother .(改为同义词)_____is Mrs.Black's______ They are my brother (变单数) ______my_______. 【Wang Hua】 is my friend .(对【】部分提问) _____is______friend? THis is David's grandfather and this is David's grandmother.(改为同义词)____are David's______