单项选择题

—How long have you ______ there
—About four years.

A．come
B．gone
C．worked
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单项选择题
While she ______ TV in the sitting room, the bell
A．watches, rings
B．is watching, rang
C．was watching, rang
单项选择题
My father ______abroad. He ______ back in two weeks.
A．has been to; will come
B．went; came
C．has gone; will come
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