Complete each of the following sentences with the appropriate from of the word given in brackets.

Complete each of the following sentences with the appropriate from of the word given in brackets.
4.The air around the earth is a _____ of mainly oxygen and nitrogen.(mix)
5.Information theory is primarily a _____ study.(theory)
9.The designer suggests we have a curtain to the_____ light.(softness)
10.As a_____ story writer,the wrote many wonderful stories popular among children.(fancy)
14.He gave me a _____ for a new house,which was too high.(quote)
15.I am very _____ to you for having given me so much help.(gratitude)
19.She_____ a few words on the paper and no one could work out what she meant by that.(scrawl)
20.He is a brilliant professor but has his_____ as an administrator.(limit)