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 |
推荐套卷
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 |