语法填空（共10小题；每小题1.5分，满分15分）
阅读下面材料，在空白处填入适当内容（不多于3个单词）或括号内单词的正确形式。
A young man, while traveling through a desert, came across a spring of clear water. ___water was sweet. He filled his leather container so that he could bring some back to an elder_had been his teacher. After a four-day journey, the young man____ ( present ) the water to the old man. His teacher took a deep drink, smiled___ ( warm ), and thanked his student very much for the sweet water. The young man went home____a happy heart.
After the student left, the teacher let____student taste the water. He spit it out, ___ (say) it was awful. Apparently, it was no longer fresh because of the old leather container. He asked his teacher, "Sir, the water was awful. Why did you pretend to like___?" The teacher replied," You tasted the water. I tasted the gift. The water was simply the container for an act of kindness and love. Nothing could be____ (sweet). "We understand this lesson best____we receive gifts of love from children. Whether it is a cheap pipe or a diamond necklace, the proper response is appreciation. We love the idea within the gift rather than the thing.