---Alice, you look puzzled, Have you understood it?
---No．I another problem just now．
A. l have thought of
B. am thinking of
C. had thought of
D. was thinking of
网友回答
A. l have thought of
B. am thinking of
C. had thought of
(答案→)D. was thinking of
解析：这题考查时态：句意是：--爱丽丝，你看起来很困惑啊，你懂吗？--不，我刚刚在想其它问题。从句意上我们可以看出是刚刚正在想。用过去进行时。选D。