语法填空(共10小题；每小题l 5分．满分l5分)
阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答题卡标号为16—25的相应位置上。
The Dragon Boat Festival is celebrated on the fifth day of the fifth month according to the Chinese calendar. For thousands of years, the festival _________ (mark) by eating zong zi and racing dragon boats in honour of Qu Yuan, who is said to have committed suicide(自杀) by drowning himself.
Qu was a minister of the State of Chu _______ (situate) in the present-day Hunan and Hubei provinces, during the Warring States Period（战国时期）. He was upright, loyal and highly respected. ______, he was dismissed from office. ______ (realize) that the country was in the hands of evil officials, Qu leapt into River Miluo on the fifth day of the fifth month. Nearby fishermen rushed over to save him but were _______ (able) to recover his body.
The people of Chu _____ mourned Qu’s death threw rice into the river to feed his ghost ______ year on the day of his death. But one year, the spirit of Qu appeared and told the mourners that a huge reptile（爬行动物）in the river had stolen the rice. The spirit then advised _______ to wrap the rice and bind it _____ throwing it into the river.
During the Duanwu Festival, zong zi is eaten to symbolize（象征，表示） the rice offerings to Qu. And the dragon-boat races symbolize _______ many attempts to rescue and recover Qu's body.