改错(共5小题，每小题2分，共10分)
That is amazing that such an old man can climb a 1000-meter-high mountain.
On the another hand, the Chinese paintings will take a longer time to learn than oil paintings.
If I am you, I would work in a small mountain village.
Once you get into trouble, don’t be nervous; that is, take easy.
After being ill for 10 days, Mary is finally back on her foot again.