【推荐2】为了解决水资源不足的问题，我们必须尽可能地节约用水。(不定式作目的状语, tackle, shortage)
We have to save as much water as possible ________.

【推荐1】当我最终到达那个我称之为人间天堂的地方时，我真的累坏了。
① When I finally arrived in ____________________ a heaven on earth, I actually felt tired out.（定语从句）
② When I finally arrived in __________________ a heaven on earth, I actually felt tired out.（名词性从句）

【推荐2】节日让我们了解我们来自何方、我们是谁、我们应该感恩什么。（appreciate, and）
Festivals help us understand where we came from, ___________________________.

【推荐1】国际家庭日力求加深人们对有关家庭问题的理解。
The International Day of Families aims to ________ people’s ________ of issues related ________ families.

【推荐2】如果你需要，你可以查阅你的笔记。
You may__________ __________ __________ __________if you want.

【推荐1】人们相信参加志愿活动非常有意义。(participate in)
It_____________________volunteer activities is very meaningful.