Spring is the best time (travel)应该用这个动词的什么形式填空?

to travel 可以,但是最好用 for travelling.
it is time to do something 和 it is time for something 意思基本一致.但是也有少许区别.
It's time for 译为：到做……的时间了.It's time for (doing)sth.
例：It is time for breakfast.吃早饭的时间到了.
It's time to 译为：是去做……的时候了.It's time to do sth.
例：It's time to go to class.