我的祖母今年三十九岁了。

My grandmother is ___thirty-nine years old this year.

她三十九岁时开始学习弹钢琴。

She started learning to play the piano at ___thirty-nine.

这场篮球比赛共有39名球员参加。

There are ___thirty-nine players participating in this basketball game.

今天的气温高达39度，热得让人难以忍受。

The temperature reached ___thirty-nine degrees today, making it unbearably hot.