根据中文意思完成句子。

69.亲爱的，你蛋糕吃得太多了。为什么不留点儿明天吃呢？

Darling, you're eating too much cake. ____________leave some for tomorrow?

70.告诉他开会的时候不要讲话。

____________ at the meeting.

71.我过去常常嘲笑那些犯错误的人，但是现在我改了。

I____________ those who made mistakes, but now I don't do it any more.

72.六年的时间让我明白了一个道理：学习的时候，最重要的不足我们做r多少题，而是我们花了多少时间思考。

____________learn something: it doesn't matter how many exercises we do, it does matter how much time____________ while learning.

73.这些年来，您不仅仅是妈妈，还是一·位朋友，谢谢您帮助我度过了很多困难时光。

____________many hard times these years,__________.

(根据汉语完成句子) 我明白了。 I ____．

A: ________（谁的）hat is this? Is this ________（你的）hat, Danny?

B: No, Miss Liu. It's too ________（大）.

A: ________（谁的）dress is this? Is this ________（你的）dress, Danny?

B: No! It's too ________（小）.

A: Yes, Danny. ________（我明白了）!

A: Whose coat ________（是）this? ________（是）this your coat, Jenny?

C: No! ________（它太大了）.