學習單：

Oliver is sleepy because he watched too much NBA last night and did not sleep enough. Annie explains the coach’s possible reasoning to Oliver. She also explains a few phrases Oliver heard from the sportscaster.

Don’t change horses in mid-stream.
He’s a snake in the grass.
A bird in hand is worth two in the bush.
Curiosity kills the cat.
Satisfaction brings it back.
You had a whale of time.