问题描述：
求：一道语法题,有关过去进行时
What’s the matter?You look sad.
Nothing much,I______ of my friends back home
A.just thought B.have been thinking
C was thinking D have thought
我觉得都解释的通!好困惑～
What’s the matter?You look sad.
Nothing much,I______ of my friends back home
A.just thought B.have been thinking
C was thinking D have thought
我觉得都解释的通!好困惑～
问题解答：
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