—Show me your permit, please. —Oh, it's
问题:
—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
—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