To their great fear, they found in the heaviest snowfall they had ever had.
A. they were catching
B. themselves caught
C. they had caught
D. themselves catching
网友回答
A. they were catching
(答案→)B. themselves caught
C. they had caught
D. themselves catching
解析：本题考查非谓语动词的用法。根据句型结构以及句子对语态的要求，此处用过去分词短语作宾语补足语，构成find oneself done，表示“发现自己被……”；另外be caught in也是固定用法，表示“遭遇”。