1. If You Snooze, You Lose!
如果你不注意, 就错过良机了。

2. B: There's no cake left. Your brother ate the last piece. If you snooze, you lose!
蛋糕都没了。你弟弟(或哥哥)吃了最后一块。你没快点行动,机会(此指蛋糕)就没了啊!

3. Answer: yes, I have to say internet is developing by leaps and bounds. If you snooze, you lose. You can't really predict what is going to happen next minute.
回答：是啊，我得承认因特网的发展是突飞猛进的。一不留心就落后了。你都无法预测到下一分钟会发生什么事情。