单项选择题

Even when Joe was in his seventies he took part in swimming competitions, and a lot of younger people couldn't_________him.

A．keep up with
B．keep up
C．keep on
D．keep off
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单项选择题
Kate won't leave the TV set ______ her supper's on the table.
A．as if
B．even though
C．provided that
D．in case
单项选择题
______ nobody was very enthusiastic about it, we decided to cancel the picnic.
A．Seen that
B．Seeing that
C．To see
D．Being seen
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