As a result of the serious flood two-thirds of the buildings in the area . A. need repair

问题补充：

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

A. need repairing

B. needs to repair

C. needs repairing

D. need to repair

答案：

(答案→)A. need repairing

B. needs to repair

C. needs repairing

D. need to repair

解析：two-thirds of…作主语时，其后谓语应用复数，故可排除选项B和C。另外，由于动词need后接动名词时是用主动表被动，而接不定式时则用被动式表示被动，故此题答案应选A，不能选D。但是，若将D改为need to be repaired则也可以选。