Though measures have now been taken to prevent further price hikes many people remain ov

问题补充：

Though measures have now been taken to prevent further price hikes, many people remain over the rising cost of food.

A. be concerning

B. concerns

C. concern

D. concerned

答案：

A. be concerning

B. concerns

C. concern

(答案→)D. concerned

解析：考察concern用法。形容词concerned担心的；与系动词remain连用，构成系表结构。Concerns是名词担心；句意：尽管措施已经被采取来预防价格上涨，很多人仍然对于食品价格的上涨很担心。故D正确。