一个英语选择题，要有解析啊，谢谢！
―HowlinghasRobert______?―Since2004.A.beentoBeijingB.becomeapolicemanC.joinedtheartclu...
―How ling has Robert ______?
―Since 2004.
A. been to Beijing
B. become a policeman
C. joined the art club
D. studied in this school
―How long has Robert ______? （改一下问题，嘻嘻打错了） 展开
―Since 2004.
A. been to Beijing
B. become a policeman
C. joined the art club
D. studied in this school
―How long has Robert ______? （改一下问题，嘻嘻打错了） 展开
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