7. So I must. → So must I.

6. find → find it， 这里的it是形式宾语， 而to make their living是不定式作宾语。

5. as this city → as that of this city,这里的that 代替the population作比较的部分是不可省略的。

4. me → mine。

3. Whom → Who， 这里do you think是插入语， 这里who是作句子主语。

2. Depend upon that → Depend upon it that, that所引导的从句不可作介词宾语， 必须加上it，再由that引导定语从句。

1. whomever → whoever, 这里是由whoever引导的宾语从句作for的宾语， 而whoever在从句中作主语。

10.Only yesterday the hotel manager assured my husband and me that he would accept our reservation for a room.

　　 注 释

9. I spoke a man who I thought to be my cousin.

8. He is taller than any one in his class.