问题
选择题
I often go to the English corner to have a free talk with my classmates ____ I am busy.
A．except that
B．except for
C．except when
D．except
答案
答案：C
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I often go to the English corner to have a free talk with my classmates ____ I am busy.
A．except that
B．except for
C．except when
D．except
答案：C