--Show me your permit, please. --Oh, it's not in my pocket. It . [ ] A.might fal
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![--Show me your permit, please. --Oh, it's not in my pocket. It . [ ] A.might fal](/pic/43_928721.jpg)
——Show me your permit, please.
——Oh, it's not in my pocket. It ________.
[]
A.might fall out
B.could fall out
C.should have fallen out
D.must have fallen out
试题答案
答案:
解析:must have+过去分词表示推测。 |