A
句意：请不要偏离话题，不然的话，我们就不会取胜得决定。祈使句与and 或or 连用是常见的说法，又如：Turn left and you will find the bookstore.向左转，你就会找到那个书店里。Listen to me or you will never succeed.听我的话，否则，你不会成功的。同时在谈到will do和be going to do 表示将来的区别时，will表意愿和既时的将来，而后者表示计划的或有迹象的将来。例如：
Give him the big apple or he oil not allow us to go with him.
—Why didn’t you come to my birthday party?
—I was going to ,but my wife returned.