（B）根据句意，在答卷纸标有题号的横线上写出括号内所给单词的适当形式。
【小题1】---Thank you for giving me so much help. --- It’s a _______ (please).
【小题2】It takes me long to get to school every day because I live in the ____ (north) part of the city.
【小题3】The ring he bought is even _______(tiny) than those I have ever seen .
【小题4】---Look! Whose are these books on the floor?
--- I have no idea. Maybe they are those ________ (guide) under the tree.