阅读下面材料，在空白处填入适当的1个单词或括号内单词的正确形式。

Finding and keeping the right balance between progress and the【小题1】(protect) of cultural sites can be a big challenge. Big challenges, however, can sometimes lead【小题2】 great solutions. In the 1950s, the Egyptian government wanted to build 【小题3】 new dam across the Nile in order 【小题4】 (control) floods, produce electricity, and supply water to more   【小题5】 (farmer) in the area. But the proposal led to protests   【小题6】water from the dam would likely damage a number of temples and destroy cultural relics. After 【小题7】 (listen) to the scientists 【小题8】 had studied the problem, and citizens who lived near the dam, the government turned to the United Nations for help in 1959.

A committee 【小题9】 (establish) to limit damage to the Egyptian buildings and prevent the loss of cultural relics. Finally, the work began in 1960.

When the project ended in 1980, it was considered a great success. Not only had the countries found a path to the future that did not run over the relics of the past, but they had also learnt that it was possible for countries to work together to build a【小题10】 (good) tomorrow.