单项选择题

It is nowhere to find my bag. I______it when I was on the bus.

A. had dropped
B. must drop
C. should have dropped
D. must have dropped
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单项选择题
Digital cameras once were luxuries for most families, but they are______available in recent years.
A. instantly
B. readily
C. quickly
D. promptly
单项选择题
He was given a fine because he______the speed limit near the school yesterday.
A. passed
B. excelled
C. succeeded
D. exceeded
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