Use the correct form of the word given to complete each sentence

III. Use the correct form of the word given to complete each sentence.
25. It is proved that smoking is very to our health. (harm)
26. It was so that we could see nothing. (fog)
27. We were worried about the of the painting. (appear)
28. The have a peaceful life. (village)
giải thích (k cũng đc)