— O’Neal works hard.
— So he does. He is often seen _____ heavily before his teammates have even arrived at practice


  1. A.
    to be sweated
  2. B.
    sweated
  3. C.
    be sweated
  4. D.
    sweating
D
根據(jù)句子結(jié)構(gòu)可知，感覺動詞see用于被動結(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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