根据下列各句句意及所给单词的首字母或汉语提示，用正确形式的单词填空。并把完整单词填写在答题卷相应的位置上。
The old woman c_______ to the police about the noise downstairs, which prevented her from sleeping at night.
Terrorists planned to make the two planes c_______ in the U.S.A. but failed.
He won the match and I went over to give him my sincere c__________.
It is generally accepted that the dove (鸽子) is the s_______ of peace.
Scientists have to do lots of s_______ researches before they draw a conclusion.
The video, which _______ (结合) singing and dancing, is popular with students.
In the summer holiday, I will visit some _______ (历史的) sites in Nanjing.
_______ (幸运的是), there are still five minutes left before the class.
The Mid-Autumn Festival is a special _______ (场合) for family.
On an _______ (极端地) cold night, the poor girl froze to death on the street.