Question

In our ________, anyone ________ breaks the law should be punished．

1. A.
   opinions; that
2. B.
   opinions; who
3. C.
   opinion; he
4. D.
   opinion; who

Answer 1

D
in one's opinion是固定用法，意思是“在某人看来，依照某人的看法”，该短语中，opinion必须用单数形式。