单选题 Look at the terrible result! If only we ______ as we were told.
A. had done B. do C. would come D. did

【正确答案】 A

【答案解析】[解析] 看看这可怕的结果!如果当时我们听话照做就好了。
[解析] 本题测试虚拟语气的用法。if only后接过去完成时，表示一种不可改变的事实，表示说话人的主观愿望，包含一种懊悔的情绪。故答案为A。