The old teacher lay wide awake on his bed, __________ all the problems he had to deal with the next day.
A.thought about | B.to think about |
C.thinking about | D.having thought about |
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The old teacher lay wide awake on his bed, __________ all the problems he had to deal with the next day.
A.thought about | B.to think about |
C.thinking about | D.having thought about |