孩子们在公园里玩得很开心。

The children are very ___happy playing in the park.

我很乐意为你解答这个问题。

I'd be ___happy to answer this question for you.

这场及时雨对我们的庄稼来说真是件喜事。

The timely rain was such a ___happy event for our crops.

她对自己的工作安排非常满意。

She is very ___happy with her work schedule.