完形填空。阅读下面短文，掌握其大意，然后从以下题所给的A、B、C、D四个选项中，选出最佳选项。
Once, a king showed two men a large basket in the garden. He told them to fill it with water from a well. After they __1__ their work, he left them, saying, “When the sun is down, I will come and see your work.”
