单项选择题

My mother always says if you keep on, you'll succeed ______.

A．in time
B．at one time
C．at the same time
D．on time
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单项选择题
-- Do you know our town at all -- No. This is the first time I ______ here.
A．was
B．have been
C．came
D．am coming
单项选择题
______ he knew nothing about the matter.
A．He appears as if
B．It seems that
C．It appears as if
D．It seems as if
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