单项选择题

I don't swim now, but I（）when I was a kid.

A、 used to it
B、 used to doing it
C、 used to
D、 used to do

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单项选择题
He went ahead（）all warnings about the danger of his mission.

A、 in case of
B、 because of
C、 regardless of
D、 prior to
单项选择题
If it too much trouble I'd love a cup of tea（）

A、 isn't
B、 wasn't
C、 weren't
D、 hadn't been
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