1. B
a book of Tom's = one of Tom's books
2. B
a friend of my father's = one of my father's friends
3. B
ever 曾经
never 从未
4. C
taller than any other boy = taller than the other boys
5. A
sometime next week 下周的某个时候
sometimes 有时候
some times 一些次
some time 一段时间
aabbd