_________ in the mountain for more than 2 days, the climbers looked pale and wea
题型：不详难度：来源：
_________ in the mountain for more than 2 days, the climbers looked pale and weak.| A．To be trapped | B．Having trapped | C．Trapping | D．Trapped |
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答案
| D |
解析
试题分析：句意,被困在山上两个多星期，攀登人员看起来苍白虚弱。句子主语the climbers与trap之间构成被动关系，For more than 2 days说明trap发生在look 之前，故选trapped，过去分词既表被动又表完成。to be trapped 虽然表被动，但不定式作状语，位于句首时只能表目的，根据句意，不构成被动，故排除。
点评：非谓语动词作状语。它的逻辑主语就是句子的主语。因此关键看它和句子主语之间的关系。如果是和句子主语之间构成主动关系，使用现在分词，若构成被动关系，使用过去分词。若表目的，使用不定式。 |
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