一、将下列句子改为复数形式： 1.There is a knife in the box. There _____ _____ ______ in the box. 2.She's a woman doctor. They're ______ ______. 3.Our teacher often tells us a story. Our ______ often ______...
一、将下列句子改为复数形式： 1.There is a knife in the box. There _____ _____ ______ in the box. 2.She's a woman doctor. They're ______ ______. 3.Our teacher often tells us a story. Our ______ often ______...