同学你好，该知识点来自沪江网校《新概念英语第三册【随到随学班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好~
Frank could hardly conceal his excitement, for he knew that he had made a real discovery.
弗兰克几乎无法掩饰自己兴奋的心情，因为他明白自己发现了一件珍品。
这是最佳答案，课文的原句，选项4，只是说类似~不可以哦~As its composition and line reminded him of an Italian painting he knew well画面构图与纸条使他想起一幅他所熟悉的意大利画~这个可不是类似~

祝学习进步~