题目内容：

He said it was only once in history that the Nobel Prize ____ to the same person,Madam Curie.
A.was twice awarded B.had been twice awarded
C.twice awarded D.had twice awarded

优质解答

B
首先授予诺贝尔奖是在说话人说话以前发生的,而主句用的是过去式,过去的过去就改用过去完成时,排除A、C.再者诺贝尔奖是被授予,所以应该用被动语态,所以选B.还有不懂可以问我