【题目】They, together with my brother, ________ to drive to Tibet since last year.
A. are planning B. is planning
C. have been planning D. has been planning
在线课程【答案】C
【解析】
试题分析：句意：自从去年他们就和我哥哥一起计划开车去西藏。句中动作表示从去年开始一直在持续，所以用现在完成进行时；主语是They，谓语动词用复数与主语一致。故选C。