Elsa had difficulty ______ the customer who was trying to communicate to her.

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问题 Elsa had difficulty ______ the customer who was trying to communicate to her.

选项 A、understanding
B、to understand
C、understands
D、understood

答案A

解析语法题。have difficulty+-ing为固定搭配。意为“做某事有困难”，故选A。

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