词汇运用 用所给词的适当形式填空，每空不限一词。
1. I think it’s ______( use ) to talk with him. It’s difficult to change his mind.
2. The terrible snowstorm kept them from______( ski ) last week.
3. My uncle will come back from London. I’m waiting for his ______ ( arrive ).
4. ______ ( wolf ) eat smaller animals when they are hungry.
5. ______（luck ), he was hurt badly.
6. His grandpa was lucky enough to stay ______( live ) during the earthquake.
7. Lushan is so beautiful that he wants to go there for the ______ ( two ) time.
8. We should encourage people ______ ( not cut ) trees any more.
9. I ______( drive ) to Beijing when my car broke down.
10.The young trees ______( die ) soon if you don’t water them in time.