一、语法填空：在空白处填入一个适当的单词或括号内单词的正确形式。
A
Each Chinese lunar ① year has a Chinese zodiac sign(生肖) animal. It's an important part of Chinese (1) ________ (tradition) culture. But what's the order of the zodiac sign? And why is it in such an order?
Here is one of the (2) ________ (story) behind it.
The Jade Emperor ② wanted to choose twelve animals to be his guards. He spread the message that if they got to the gate of Heaven early, they would get good positions. But (3) ________ (do) this, they had to cross a great river.
Rat got up at midnight, and he crossed the river (4) ________ the help of Ox. Rat won first place and Ox was second. Tiger and Rabbit came third and fourth because both were fast and competitive.
Dragon was (5) ________ (five), and the Jade Emperor said Dragon's son could be sixth. (6) ________ Dragon's son didn't come with him that day. Just then, Snake came forward, so Snake was sixth.
Horse and Goat arrived at the same time. They acted very (7) ________ (polite) and each let the other go first. They became seventh and eighth.
Monkey was far behind. But he jumped between trees and stones, and (8) ________ (catch) up to be ninth. (9) ________ rest were Rooster, Dog, and Pig. These 12 animals became guards of the the gate of Heaven. Thus the years of the lunar calendar (10) ________ (name) for each of them.