句型转换。
1.We should allow teenagers to swim in the river.（改为被动语态）
Teenagers to swim in the river
2. She said something important to me yesterday.（改为否定句）
She important to me yesterday.
3.1 was so anxious that I couldn't sleep.（改为同义句）
1 was ____ anxious ____ sleep.
4．They are very friendly.（改为同义句）
They are ____ to ____ .
5. I spent two hours doing my homework last night.（对画线部分提问）
____ did you spend doing your homework last night?
