I to go for a walk，but someone called and I couldn’t get away.
A. was planning
B. planned
C. had planned
D. would plan
网友回答
A. was planning
B. planned
(答案→)C. had planned
D. would plan
解析：
句意为：我本打算去散步，但是有人打电话，所以我没能去。plan是在called和couldn’t get away之前发生的动作，所以用过去完成时。