问题补充：
--- Joan, whatin your hand?
--- Look! Its a birthday gift for my grandmother.
A. had you held
B. are you holding
C. do you hold
D. will you hold
答案：
A. had you held
(答案→)B. are you holding
C. do you hold
D. will you hold
解析：本题考察时态用法。通过语境判断是现在的时间，并且表达动作正在发生，故选B；
