词形变化。
1. It’s _______(possible) for me to work out the problem. It’s too hard.
2. I think you can work out the math problem _______. (success)
3. Waste paper can be _______(cycle).
4. Please give me the full _______ (describe) of the accident.
5. As soon as they got to the railway station, it began to rain _______. (heavy)