单项选择题

Have you decided to______ your university courses

A．keep on with
B．keep up with
C．keep on
D．keep up
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单项选择题
He knew himself to be raw, quite______ of making mistakes through his inexperience.
A．able
B．possible
C．capable
D．likely
单项选择题
Although the two players are______ in the tennis court, they are really good friends.
A．partners
B．companions
C．rivals
D．enemies
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