试题题干
Fill in the blanks with an item as required.
With an appropriate relative pronoun or relative adverb:
He had an academic paper published in a well-known journal,
was a great achievement for a young graduate student.
参考答案
试题解析
本题考查非限制性定语从句关系词的选择。逗号前是一个完整的句子，空后句子缺主语，所以这里填引导词which指代前面整句话，且在从句中作主语。
句意：他在著名期刊上发表了一篇学术论文，这对一个年轻的研究生来说是一项伟大的成就。