The difficulty which we had with the local people has now been removed.A. communicationB

问题补充：

The difficulty which we had with the local people has now been removed.

A. communication

B. to communicate

C. communicated

D. communicating

答案：

A. communication

B. to communicate

C. communicated

(答案→)D. communicating

解析：考查固定结构，固定结构：have some difficulty (in) doing sth做某事有困难。本题把the difficulty提前，后面使用定语从句，which指代先行词the difficulty在句中作为had的宾语，后面使用doing的形式。故D正确。