题目内容：

请根据中文句子含义，把对应的英语句子的空缺部分补充完整，每空填一词。

1.当我们拜访我的故居时，往事一下子涌上心头。

When we visited my old family home, memory ________ _________ __________.

2.评委们惊讶地发现这个10岁的小男孩居然会说五国语言。

The judges _________ _______ ________ that the 10-year-old boy could speak five foreign languages.

3.坚信他有能力胜任，委员会已经任命他担任我们学校的校长。

______ ________ his ability, the committee have appointed him as headmaster of our school.

4.他朝后退了退，举起了右手，好像是在自卫。

He walked backwards and raised his right hand ______ _______ _______ _______．

5.自从温度达到25摄氏度，土壤里的有害细菌就在不断增多。

The harmful bacteria in the soil_________ _________ ________ since the temperature reached 25 degrees centigrade.