用所给单词的适当形式填空。 1. It's so ________ (fun)
题型：填空题
问题：
用所给单词的适当形式填空。
1. It's so ________ (fun) and interesting.
2. We must take care of ________ (us).
3. It is very common ________ (raise) money in Canadian and American schools.
4. I hope everything ________ (go) well.
5. The children enjoy ________ (swim) in the river in summer.