— O’Neal 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

D


解析:

根據(jù)句子結(jié)構(gòu)可知，感覺動(dòng)詞see用于被動(dòng)結(jié)構(gòu)，選項(xiàng)A、C不可以用于這一結(jié)構(gòu)中；選項(xiàng)B為被動(dòng)意義，不成立；只有選項(xiàng)D(sweating)現(xiàn)在分詞與be seen構(gòu)成復(fù)合結(jié)構(gòu)，強(qiáng)調(diào)狀態(tài)。

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