New Words：

yawn [jɔ:n]
v.打哈欠
n.哈欠；无聊的人或事；无趣的想法

Sample Sentences：

He stood up, stretched and yawned.
His long boring story made me yawn.
She stretched her arms out and gave a great yawn.
The meeting was one big yawn from start to finish.

stretch [stretʃ] v.伸展；延伸；伸出；舒展