单项选择题

______ I a billionaire, I would travel in space like an astronaut.

A．If only
B．Wishing
C．Were
D．Should
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单项选择题
She regrets ______ idle when young.
A．to have been
B．her being
C．her having been
D．having been
单项选择题
All things ______, her paper is of greater value than mine.
A．having considered
B．considering
C．being considered
D．considered
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