It’s seems amazing that at my age I am still fit enough to cycle 20 kilometres in an afternoon. [考点] 此句中的it是形式主语，真正的主语是后面的that从句。 [考例] ______ felt funny watching myself on TV. One B. This C. It D. That [点拨] 此句中的it是形式主语，真正的 主语是后面的watching myself on TV。