—Show me your permit, please.
—Oh, it's not in my pocket. It ________.
A.must have fallen out | B.might fall out |
C.could fall out | D.should have fallen out |
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—Show me your permit, please.
—Oh, it's not in my pocket. It ________.
A.must have fallen out | B.might fall out |
C.could fall out | D.should have fallen out |