【推荐3】印加的建筑工人将石头切割成精确的尺寸，仅仅凭着石头间的完美贴合，即可稳固墙体。
Inca builders cut stones to ________ ________ so that nothing was needed to hold walls together ________ ________ the perfect fit of the stones.

【推荐1】In today’s class, our teacher will ask us to talk about the things and people. We think the things and people are the most important in our life. (使用定语从句关系代词合并成一个句子)

【推荐3】_________ (我所想到的解决这个问题的方法) prove to be practical.(way) (根据汉语提示完成句子)