شرکت در آزمون آنلاین زبان انگلیسی 1 - زبان انگلیسی 1 | آزمون شماره 13010

Regarding the usage of “on” as a preposition of time, which sentence is grammatically WRONG?

. Nobody wanted a war but when the ships were down and the enemy was ready to attack, everyone volunteered to ...................................... their homeland

 .......................... If you have an idea of what you want and have thought carefully and in detail about how to get it , then you have a/an