8, The next morning, the box had disappeared but Mrs. Ramsay was sure that the kidnapper would keep his word.

keep his promise= keep his promise 遵守承诺

word 表示诺言时，要采用单数形式

相关词组：

break his word 食言；go back on one's word 食言

give sb. one’s word 向某人保证; as good as one's word 表示守信用，侧重点在于强调一个结果

e.g. I give you my word that I will return your money. 我保证我会把钱还给你。

e.g. He promised to return my money and he was as good as his word. 他许诺会把钱还给我，正如他所言他遵守了承诺。

9，Sure enough, Rastus arrived punctually at seven o'clock that evening.

sure enough 果然，无疑

e.g. I said it would happen, and sure enough it did happen. 我说过会发生的，结果确实如此。

10, Considering the amount she paid, he was dear in more ways than one!

in more ways than one ( way ) = in many ways

双重意义：dear  price 昂贵； expensive 珍贵