答：show 可以跟that从句：
To indicate; register:The altimeter showed that the plane was descending.
这里不行,是因为that后不成句.the changes of water use 是主语,water use中use是名词.
从句没了谓语.老师说得没错,这里加that是错的,去掉就对了.shows 后跟the changes作宾语.
老师可能没有讲清楚.但不是废物.
楼主你题目也没有打完整.
楼上别激动! 中国很大,废物老师教不过来的.网上答题,看到的人倒是蛮多的.
第一句话完整的是：In conclusion, the graph shows that the disease was increasingly prevalent until the 1980s when it was eradicated from Someland.应该没错.佩服，你怎么知道第一句的完整？