1.The potato is only one of the well-known vegetables in the world.
对 错

2. Potatoes can be grown more easily than other crops.
对 错

3.Potatoes were grown for food in France in 1778.
对 错

4.One-second of the world's potatoes are grown in Europe.
对 错

5.The potato was eaten in nearly all parts of the world.
对 错