2. 外语
  3. "Hotel workers suspect that the fire was ignited by a cigarette and that a guest may have thrown the cigarette into a bush from

"Hotel workers suspect that the fire was ignited by a cigarette and that a guest may have thrown the cigarette into a bush from

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问题 "Hotel workers suspect that the fire was ignited by a cigarette and that a guest may have thrown the cigarette into a bush from the pool deck.’The modal auxiliary verb phrase "may have thrown" in the sentence expresses______.
选项 A、high possibility in the past
B、low possibility in the present
C、high possibility in the present
D、low possibility in the past
答案D
解析 该句的情态助动词may表示程度较低的推测。虽然形式上是现在时，但是表示的时间概念是过去。情态助动词的现在时形式和过去时形式不是区分时间的主要标志，所表示的时间通过情态助动词后的动词形态判断，动词的完成体形式一般表示过去时间。
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