阅读下列短文, 从每题所给的 A、B、C、D 四个选项中选出最佳选项。
A
Four Seasonal Best-Sellers Online
Are you among the parents who are seeking books for your children during the coming winter vacation? The following seasonal best-sellers may be on your list of choices.
Salt
Salt, in which Helen Frost tells a story about friendship between Anikwa and James, was set in a time of war, Anikwa and James spent their happy days together in the forests of the Indiana Territory until facing the cruel war. As a children's literature, it was once considered as a Kirkus Reviews Best Book in 2013.
Now
Now was set in the present day. This is the final book in Morris Gleitzman's series that began with Once, continued with Then and Now. In the novel, Felix, a successful man with painful memories of his childhood recalls his time with his granddaughter Zelda. It has been popular with teenagers since it came out. Now is one of Kirkus Reviews Best Children's Books of 2012.
Green
Die-cut（模切的）pages bring surprise after surprise in this magical new book. How many kinds of green are there in the world? Laura Vaccaro Seeger shapes a respect to a single color that will delight and quite possibly shock you, Green was considered as Kirkus Revievws Best Children's Book of 2012 and a 2013 Caldecott Honor Book.
Holes
In this wonderfully creative novel, Louis Sachar makes up a puzzle about Stanley Yel-nats, a boy who was sent to juvenile detention center（少年管教中心）Camp Green Lake, and forced to dig a hole a day, five feet across in the hard earth of the dried-up lake bed. It is a darkly humorous tale. The book wins the Winner of the National Book Award and was one of the best sellers among children.
21. Who is the author of the book Salt?
A. Louis Sachar. B. Helen Frost. C. Stanley Yelnats. D. Anikwa.
22. What do we know about the book Green?
A. It tells a serious but funny story.
B. It is one of the series by Laura Vaccaro Seeger.
C. It talks about friendship in the period of war.
D. It describes different kinds of one color.
23. What do the four books in the text have in common?
A. They are set in modern times.
B. They share the same honor as each other.
C. They don't sell as well as first published.
D. Their readers are mostly children.
