问题补充:
So absorbed in the experiment that he didn’t even notice it was already over 12 o’clock.
A. did he
B. he did
C. was he
D. he was
答案:
A. did he
B. he did
(答案→)C. was he
D. he was
解析:考查倒转句。把“so+形容词/副词”放在句首,后面的主句使用部分倒装的形式。本句是固定搭配be absorbed in…沉浸于…之中;句意:他如此沉浸于实验中,以至于他没有注意到已经是12点了。故C正确。