请帮我做这道题并讲解,谢谢---he first heard of that the compass was first

答案是：A.It was from the teacher that
首先是 hear of something from somebody 的搭配,由此可排除B,D.
然后it is .that ...的由it 开头引导的从句,也是固定搭配,因此选A.
再问： 请问这是一个强调句型还是It 作形式主语呢？
请再帮我一道题好吗？
请帮我改错That opera was really wonderful .I enjoyed each minute of it
非常感谢！
再答： it作形式主语，也有强调的意思，强调是从老师那里听来的。
That opera was really wonderful .I enjoyed each minute of it.

至于这两句话，第一句没看出有问题，第二句可能改为I enjoyed every minute of it.比较好。因为each 强调的是每一个，而every 强调的是全部