題文 ぼくの記憶に間違いがなければ、その本の著者がドイツ人であるとわかったのは、今から10年前のことだ。
If I remember right, it was 10 years ago [proved / that / the book / to have been / written] by a German.
正解 If I remember right, it was 10 years ago that the book proved to have been written by a German.
貴方の答え If I remember right, it was 10 years ago that the book proved to have been written by a German
回答時間 22秒
全体の成績 20人中 5人正解 (25.0%) 平均正解時間 112.00秒