大学英语：One idea was that it reached out to "the edge of the world".

　　Another idea was that at the equator the ocean would be boiling hot.

　　这两个都是表语从句和主句中的系动词连用的句子。结构为：主语＋系动词＋表语从句。请看下面的例句：My idea is that we contact him as soon as possible.（我的想法是我们应该尽快跟他联系。）

　　请翻译下面的句子：

　　1) My suggestion is that we should put off the meeting.（我的建议是我们应该把会议延期。）

　　2) One advantage of solar energy is that it will never be used up.　（太阳能的一个优点是用之不竭。）

　　3) 问题是你不在时谁照管孩子。　（The problem is who will take care of the children while you are away.）

　　4) 看起来天要下雨。（It looks that it is going to rain.）