At no time, as we know, forget that solving Taiwan Issue is entirely internal Chinese affair.
A. we can
B. we could
C. can we
D. could we
网友回答
A. we can
B. we could
(答案→)C. can we
D. could we
解析：考查倒装句。否定词或者半否定词放在句首的时候，后面使用部分倒装的形式。句意：正如我们所知，我们千万不能忘记解决台湾问题是中国的内部事务。故C正确。