单项选择题

I'm (old enough) (not to) let my trouble (to interfere) (with) my work.

A．old enough
B．not to
C．to interfere
D．with
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单项选择题
He (jumped) (over) the fence, ran (across) the field, and (disappearing) into the woods.
A．jumped
B．over
C．across
D．disappearing
单项选择题
If you (happen) to (come across) Jack, please tell him (to come) and see me when he (will be) free.
A．happen
B．come across
C．to come
D．will be
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