11.  Some of the books on my major I buy this year are English editions.

12.  In the beginning of the essay, the writer tells us that he bought a wood and then, with a tinge of self-criticism, the author outlines four effects of property ownership and overly materialistic tendencies.

13.  So, it is time that we put our vocabulary books away and buy an interesting book.

14.  Jim and Della used the most precious thing in exchange for what his or her partner once wanted to have--Jim sold the gold watch to buy the set of combs Della had worshipped long in a Broadway window, while Della's beautiful hair was sold to make enough money for a platinum fob chain that must matches Jim's gold watch well.

15.  Besides , a lot of money which ought to be spent on learning materials will be wasted on buying clothes or gifts .

16.  To enlarge their vocabulary, many people buy a word list book to read time after time, hoping to remember the words.

17.  Do your friends buy clothes or other things on the net?

18.  A few days later, I hear that do some reading may improve our vocabulary, so I bought some books, such as crazy English, magic english and so on.

19.  It is neither bought nor sold.

20.  They buy many books with a good many lists of test words.