题目

After the accident, she had some difficulties _______ recalling what had happened _______ her. A. on; to             B. on; on                   C. in; to                   D. in; on 答案：C 解析: have difficulty (in) doing sth.意为“做某事吃力、费力”；happen to sb.意为“发生在某人身上”。

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