It is estimated that much of a teenager's time is spent______with friends.

A. to talk 　　　　　　 　　　　  B. talking

C. being talked         　　　　  D. having talked

昨日习题答案：

It is one __________best sellers in our country now.

A. of them 　　　　　　 　　　　  B. of those

C. of this              　　　　  D. of their

标准答案是：B

本题分析：
those为特指限定词，后接复数名词。