一、选用方框中单词的适当形式完成句子。
government railway root soil support
1. Plants use their to take in water from the ground.
2. Everyone should follow the rules made by the .
3. She her opinion with facts from the history book and won lots of praise.
4. The old that used to carry many trains are not in use now.
5. Farmers need healthy to grow good corn.

1. roots 2. government 3. supported 4. railways 5. soil