单项选择题

He ______ the 9:00 train because he didn't leave home until 9:10.

A．couldn't have caught
B．shouldn't have caught
C．ought to have caught
D．must not have caught
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单项选择题
I appreciate ______ the opportunity ______ abroad two years ago.
A．being given...to study
B．having been given...to study
C．being given...studying
D．having been given... studying
单项选择题
Before the bottle was a third ______, he began to tell me the story.
A．vacant
B．hollow
C．finish
D．empty
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