许多地区依靠谷类作物作为食物来源。

Many regions rely on ___cereal crops for sustenance.

田地里种着谷类作物，主要是小麦。

The fields were planted with ___cereal crops, primarily wheat.

燕麦是一种在较冷气候下生长的耐寒谷物。

Oats are a hardy ___cereal grown in cooler climates.