问题补充:
—ONeal works hard.
—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:
A. to be sweated
B. sweated
C. be sweated
(答案→)D. sweating
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。