Child_____he was, he knew that was the right thing to do.
A. as
B. who
C. that
D. like
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根据陈建军教授所讲,改换能源结构,大量地利用石油、天然气,利用核能,这是我国中短期的能源改造的策略。()
I was so______on my study that I didnt notice the time.
A. preoccupied
B. intent
C. engrossed
D. absorbed