问题
选择题
You can go out, _________you promise to be back before 11 o'clock.
A．as far as
B．so far as
C．when
D．so long as
答案
答案：D
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You can go out, _________you promise to be back before 11 o'clock.
A．as far as
B．so far as
C．when
D．so long as
答案：D