读图回答下面问题：

（1）写出形成图中洋流的盛行风带名称

②________； ③________。

（2）图中②③④洋流中按性质分属于暖流的是________。

（3）图中④洋流对沿岸气候的影响是________________。

（4）假若图中海域为太平洋，则Ａ处为世界著名的大渔场之一的________渔场，它是由________暖流和________寒流两条洋流交汇而形成的。

You were out enjoying yourself when you ________.

A．must have studied

B．would have studied

C．should be studying

D．ought to have been studying