The problem will not be difficult to solve if properly .A. to be handledB. handlingC. han

问题补充：

The problem will not be difficult to solve, if properly .

A. to be handled

B. handling

C. handled

D. being handled

答案：

A. to be handled

B. handling

(答案→)C. handled

D. being handled

解析：考查状语从句的省略句：句意：如果处理得当，这个问题解决起来不难。If properly handled=if the problem is properly handled，当主从句的主语一致的时候，可以省略状语从句的主语和be动词，选C。