问一道选择题
—I heard they____________football on the playground.
—Thanks.I'll go to tell the exciting news to them right now.
A、have played B、were playing C、are playing D、would play
老师讲的答案是C……说什么要靠语境来，，以前老师教的都是主句过去式，从句就是过去的时态，这个题目把我整个人都搞凌乱了……
求解释，谢谢各位大神！
—I heard they____________football on the playground.
—Thanks.I'll go to tell the exciting news to them right now.
A、have played B、were playing C、are playing D、would play
老师讲的答案是C……说什么要靠语境来，，以前老师教的都是主句过去式，从句就是过去的时态，这个题目把我整个人都搞凌乱了……
求解释，谢谢各位大神！
