1．To their great relief，the missing child returned home，tired (tire) but sound.
2．The little girl burst out crying (cry) when she fell down.
3．The subject came up during a predinner drink with our guest.
4．We cannot understand disease unless we understand the person who has the disease.
5．The society was set up to_preserve(preserve) endangered species from extinction.
Ⅱ.单句改错
1．Text messages have exploded in popularity in recent years，particular among young people.particular→particularly
2．Those who eager for success will make every effort to achieve it.who后加are
3．The idea occurred him when he saw an apple fall down.him前加to
4．She looks as if she is ten years younger.is→were
5．They abandon themselves to drink all day.drink→drinking
