Our duty is to their country against both domestic and foreign enemies’ attack.A. delayB.

问题补充：

Our duty is to their country against both domestic and foreign enemies’ attack.

A. delay

Bdefend

C. defeat

D. depend

答案：

A. delay

(答案→)B. defend

C. defeat

D. depend

解析：句意：我们的责任是保卫其国家反对国内外敌人的攻击。A. delay延迟，拖延，耽搁；B. defend保卫；C. defeat 击败；D. depend依赖，依靠。由题干内容可判断B正确。

考点: 考查动词的辨析。