To their great fear they found in the heaviest snowfall they had never had.A. they were c

问题补充：

To their great fear, they found in the heaviest snowfall they had never had.

A. they were catching

B. themselves caught

C. they had caught

D. themselves catching

答案：

A. they were catching

B. themselves caught

C. they had caught

D. themselves catching

解析：考查反身代词和过去分词用法。用themselves表示强调他们自己。Be caught in陷入…；本题使用形容词短语做宾语补足语。句意：让他们害怕的是，他们发现自己陷入了从未遇见过的大学之中。故B正确。