您要查找的是不是：
- It's so cold that even the river has frozen. 天气冷得河都封冻了。
- The river has scour out a passage in the sand. 这条河在沙土中冲出一条水道。
- The river has narrowed down over the past 20 years. 这条河在过去的二十年变窄了许多。
- The river has risen (by) several metres. 河水上涨了好几米。
- The river has frozen. 河结了冰。
- The river has three main branches. 这条河有三条主要的支流。
- The river has been polluted by waste products from the factory. 这条河已经受到工厂排放的废料的污染。
- The river had worn a ravine between the hills. 那条河在两山之间已造成一个深谷。
- The river has gone down to its usual level now that the floods are over. 洪水己经过去，所以河水又退到原来的高度。
- The river has narrow down over the past 20 years. 这条河在过去的二十年变窄了许多。
- The river has flooded the meadows. 河水淹没了草地。
- The water in the river has fallen two feet . 河水下落两英尺。
- The river has run over its banks. 河水已溢出了堤岸。
- The river has been defiled by waste from factories. 这条河流已经被工厂中的废物污染。
- Now the river has been bridged for the fourth time. 现在这条河已在第四次架桥了。
- The river has been bridged over. 河上已架起了桥。
- The snow has frozen hard on the road. 路上的雪已经冻得很硬了。
- The scheme to divert the river has come to a full stop because of lack of money to finish it. 使河流改道的方案已完全停止，因为没有钱来完成这一方案。
- The river has been fouled up with oil. 河被石油污染了。
- The window has frozen up and I can't open it. 窗户给冻上了，我打不开。
