问题
句型转换
按要求改写句子。
1. Is this a bathtub?（用a shower 改成选择疑问句）
2. He is cleaning the bedroom.（对划线部分提问）
3. This is a refrigerator.（改成复数形式）
4. The sofa is in the living room.（对划线部分提问）
答案
1. Is this a bathtub or a shower?
2. What is he doing?
3. These are refrigerators.
4. Where is the sofa?
