英语第4单元同步验收题(3)

The modern farmer has to be a mechanic, a scientist and an accountant. He must understand what machinery is necessary for his kind of farm; he must know the new technical advances in agriculture and how to use chemical products to improve his crops. Although he has more modern equipment and far more scientific aids than his grandfather had, the farmer is still dependent on the weather. As he can never be sure what the weather will do, he must be prepared to take risks, and face the possibility of losing everything.

1. According to the writer, modern farms________ .

A. must be more and more difficult to work on