—Is there anything wrong, Bob? You look sad.
—Oh, nothing much. In fact, I of my friends back home.
A. have just thought
B. was just thinking
C. would just think
D. will just be thinking
网友回答
A. have just thought
(答案→)B. was just thinking
C. would just think
D. will just be thinking
解析：这是两个人之间的对话。第一个人说：“有什么事吗？鲍勃，你看起来很难过。” 第二个人说： “哦，没什么。事实上，我在想我的那些回家的朋友。”表示过去某一时间正在进行的动作，需用过去进行时，所以选B。