句型转换，每空一词。
1. I want to buy some cakes.(改为同义句)
I ________ ________ to buy some cakes.
2. They'd like some oranges.(改为一般疑问句)
________ ________ ________ some oranges?
3. This book is 15 RMB.(就画线部分提问)
________ ________ ________ is this book?
4. He'd like cabbage and mutton dumplings.(就画线部分提问)
________ ________ ________ dumplings would he like?
5. Would you like a cup of tea?(改为同义句)
________ ________ a cup of tea?
