句型转换。
1.His father stayed in Shanghai for four months last year. (对划线部分提问)
________ ________ did his father ________ in Shanghai last year?
2.The work must be given up. (改为否定句)
The work ________ ________ given up.
3.Lucy's never been to the Great Wall. (完成反意疑问句)
Lucy's never been to the Great Wall, ________ ________?
4.Tom came to our school three years ago. (改为同义句)
Tom ________ ________ ________ our school for three years.