题目

题型：不详难度：来源：

– How long have you been collecting stamps?
–         I was ten years old.
A. Since                        B. When                 C. Because

答案

A

解析

试题分析：A. Since自从，B. When当，C. Because 因为，句意：你收集邮票有多长时间了？自从我十岁开始。故选A。