题目内容：

根据所学语法知识填空，每空一词。

1.________ began as a small activity has taken the shape of an inspiring institution of international standards.

2.It will be 321 days ________ we take part in the college entrance examination.

3.She opened it and let out a deep breath. Inside it ________ (be) two sharp knives.

4.The flowers his friends gave him will die unless ________ (water) every day.

5.It was ________ (repair) the old clock that the old man spent the whole morning at home.