Only when he finished his homework ___________that he had made a mistake

他十年前搬到这儿的。

他在这所学校任教多久了？

春天是游览这个城市的最佳季节。

我希望我们的演出会成功。

他们正在打篮球。

Twenty-eight people have been arrested since then and charged withinterfering with the pipeline construction.

The entire structure cost more than $2.5 million to build at the time.

It may also severely limit activities such as logging, road-building,and hunting.

Both sides show no signs of backing down.

They say their local economies depend on the use of these areas.