复数名词 — 英语填空题

用所给单词的适当形式填空（每空一词，注意规则复数名词的拼写）。1. Look at those ______ (monkey) in the tree. They are so cute! 2. There are three ______ (library) in our city. 3. These ______ (story) are very interesting. 4. How many ______ (bus) can you see over there?