He had trouble (finding out) (that) the national park (lay) in the coastal area (or) in the mountains.

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问题 He had trouble (finding out) (that) the national park (lay) in the coastal area (or) in the mountains.

选项 A、finding out
B、that
C、lay
D、or

答案B

解析 应改为连词whethers;whether…of…表选择“是否…或者…”。
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