选 A
虚拟语气,
）、对现在情况的虚拟（与现在的事实相反）：
从句用过去式或过去进行式(时间上是同时的).其句子结构为：宾语从句的谓语be和were(was),实义动词用过去式.例：
1.I wish (that可省略,下同)I knew the answer to the question.(wish,动词过去式knew)我希望知道这个答案.(事实上是不知道)
2.I wish it were spring in my hometown all the year around.(wish,were)但愿我的家乡四季如春.(事实上不可能)
3.I wish I were a bird.(wish,were)但愿我是只小鸟.(事实上不可能)