单项选择题

—Are you a volunteer now
—No，but I （）．I worked for the City Spots Meeting last year．

A．used to
B．used to be
C．used to do
D．was used to

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热门试题

单项选择题Look over there. ______!

单项选择题You may take them all home （）．

A. if possible
B. if can
C. unless so
D. even if you can