问题补充：
Never to the foreign invaders, no matter how powerful they seem to be.
A. we can give in
B. we should give up
C. can we give in
D. should we give up
答案：
A. we can give in
B. we should give up
(答案→)C. can we give in
D. should we give up
解析：句意：我们不可能向外国侵略者屈服，无论他们看起来是多么强大。这里never是否定词放在句首，用部分倒装，排除AB。Can“能够”，所以选C。
