We discussed where to go for the weekend but we decided to stay at home .A. at the endB.

问题补充：

We discussed where to go for the weekend, but we decided to stay at home .

A. at the end

B. by the end

C. in the end

D. on end

答案：

A. at the end

B. by the end

(答案→)C. in the end

D. on end

解析：本题的含义是我们最终决定在家里呆着，in the end表示最终的意思，故本题选C。