As a result of the serious flood two thirds of the buildings in the area .A. needs repairi

问题补充：

As a result of the serious flood，two thirds of the buildings in the area .

A. needs repairing

B. need repairing

C. need to repair

D. needs to be repaired

答案：

A. needs repairing

(答案→)B. need repairing

C. need to repair

D. needs to be repaired

解析：分数或者百分数修饰名词作主语时，谓语的数由名词而定，所以此题中谓语的数是由buildings决定的。当need/want/require作“需要”解释时，其后接的动词若和句子的主语之间是动宾关系，则该动词要用动名词的主动形式或者动词不定式的被动形式。