With a lot of difficulties they went to the seashore and had a good rest.A. settled B.

问题补充：

With a lot of difficulties , they went to the seashore and had a good rest.

A. settled

B. settling

C. to settle

D. being settled

答案：

(答案→)A. settled

B. settling

C. to settle

D. being settled

解析：考查with复合结构。With复合结构：with+宾语+宾语补足语。本题的后半句他们去了海边休息，说明difficulties已经被解决。用过去分词表示被动和已经完成。句意：因为很多困难都被解决了，他们去了海边好好休息。故A正确。