“Show me your permit, please. “Oh, it’s not in my pocket. It . A. might fall out
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“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
D
解析:
既然“通行证现在不在口袋里”，那么它“掉出去”应发生在过去，故排除A和B。比较选项C和D所表示的意思，选D更恰当。