托福词汇辅导：托福关键词汇(25)

　　1. People who do not sleep enough tend to become irritable.
　　[A] easily annoyed [B] ill [C] weary [D] stiff and sore

　　2. When cornered, a bobcat is ferocious.
　　[A] careful [B] fierce [C] frustrated [D] trapped

　　3. The Earth comprises three principal layers.
　　[A] adapts to [B] benefits from [C] consists of [D] focuses on

　　4. The pupil of human eye dilated when the level of light is cow.
　　[A] reacts [B]focuses [C] expands [D] numbs

　　Keys: ABCC