Question

They talked as if they were bosom friends for many years but the truth was that

they were just nodding()
A.acquaintance B.acquainted
选哪个请解释

Answer 1

选A。
题面句子翻译：他们说起话来仿佛知己，但实际上他们只是点头之交。
点头之交知道的话直接选A。
其他方法推断：
考察对词性的掌握，nodding是动词nod（点头）的现在分词形式，可以修饰名词，所以选A。B选项是过去分词形式，需要副词来修饰，常见组合为newly aquainted（刚认识的）。

Answer 2

They talked as if they were bosom friends for many years but the truth was that 5
they were just nodding()
A.acquaintance B.acquainted