“我太累了，”他一边打哈欠一边伸展手臂说道。

"I'm so tired," he said, yawning and ___stretching his arms.

保罗总是在锻炼前后做伸展运动。

Paul always ___stretches before and after exercising.

将手臂向上伸展过头顶。

___Stretch your arms above your head.