75.At that time the two cuontries were still at ____ and they mustn't trade in agricultural products with each other.

A.battle B.campaign C.struggle D.war

76.Our victory in the school sports meet resulted from the collective ____ of all the classmates.

A.wisdom B.action C.brightness D.performance

75.答案是D，

此题考查短语，at war，在交战。

76.答案是A，

此题考查词汇和语境，此句意思是:我们在校运动会上的胜利源于全体同学集体的智慧。Wisdom，智慧，才智。