They appeared me, so I had to explain to them.
A. misunderstanding
B. misunderstood
C. to be misunderstood
D. to have misunderstood
网友回答
A. misunderstanding
B. misunderstood
C. to be misunderstood
(答案→)D. to have misunderstood
解析：考查非谓语动词。句中appear to do看起来做，根据句意用不定式的完成式。句意：他们看起来误解我，因此我不得不向他们解释。