题目内容：

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。

1.The old woman c_______ to the police about the noise downstairs, which prevented her from sleeping at night.

2.Terrorists planned to make the two planes c_______ in the U.S.A. but failed.

3.He won the match and I went over to give him my sincere c__________.

4.It is generally accepted that the dove (鸽子) is the s_______ of peace.

5.Scientists have to do lots of s_______ researches before they draw a conclusion.

6.The video, which _______ (结合) singing and dancing, is popular with students.

7.In the summer holiday, I will visit some _______ (历史的) sites in Nanjing.

8._______ (幸运的是), there are still five minutes left before the class.

9.The Mid-Autumn Festival is a special _______ (场合) for family.

10.On an _______ (极端地) cold night, the poor girl froze to death on the street.