句型转换。
1. Tina used to play tennis with her friend on the playground. (改为否定句)
Tina _______ _______to play tennis with her friend on the playground.
2. Many visitors will come to our city in May. (对划线部分提问)
_______ _______many visitors come to our city?
3. The boy is so weak that he can’t walk a long time. (改为同义句)
The boy is _______weak _______walk a long time.
4. He asked me, "Do you often help your mother with the housework on weekends?"(句意不变)
He asked me _______I often_______my mother with the housework on weekends.
5. 我们应当勤洗手、多锻炼，以防甲型H1N1流感。
We should often _______our _______and do more exercise to prevent the A／H1N1 flu.