别人主动提出帮助时,你可以这样谢绝: .
You must return the book in fifteen days.It's a of our library.
In the playground, I threw the ball to her and she (catch)it
Which is more (value) to you, health or wealth?
In summer, it often rains (heavy) with strong wind in Southern China.
The higher we climbed, the (thin) the air became.