—So he does.He is often seen ________heavily before his teammates have even arrived at practice.

A. to be sweated B. sweated

C. be sweated D. sweating

【答案】D

【解析】根据句子结构可知，感觉动词see用于被动结构，选项A、C不可以用于这一结构中；选项B为被动意义、不成立；只有选项D(sweating)现在分词与be seen构成复合结构，强调状态。