Yesterday Professor White_________to the library and unexpectedly found a very useful book.
A. set off
B. took away
C. dropped in
D. broke into
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This shows that they do not understand the (important)_________of the question.
The(celebrate)_________didn’t end until midnight.
They took part in all kinds of social(act)_________on campus.
The writers sudden(die)_________was much regretted in Britain.