题目内容
Sam ________ coins since he was eleven years old, and now he has hundreds of them.( )A. collected B. had collected
C. has been collecting
答案：C
练习册系列答案
开心蛙状元作业系列答案
课时掌控随堂练习系列答案
一课一练一本通系列答案
相关题目
Sam ______ coins since he was eleven years old, and now he has hundreds of them.
| A．collected | B．had collected |
| C．has been collecting | D．had been collecting |