答案：A分析：A，名词结构，that普通代词，同比较级里that of

答案：A分析：A，名词结构，that普通代词，同比较级里that of的惯用法。B，语法错误 C，分词带宾语不要加定冠词 D，割开了动宾结构，而understanding不能直接带宾语从句。参考译文：在无机化学中一个新的挑战领域就是理解过渡金属在被称作酵素的生化催化剂中的作用。

Kết quả (Anh) 1:

Answer: a study: a, noun, that ordinary pronouns level compared with that of usage. B, c syntax errors, Word object without the definite article d, cut open a verb-object structure, and understanding not directly the object clause. Text: in the field of inorganic chemistry a new challenge is to understand the transition metal's role in biochemical catalysts known as enzymes.

Kết quả (Anh) 2:

Answer: A analysis: A, the term structure, that ordinary pronouns, with comparative in that of the idiom. B, a syntax error C, do not object segmentation with the definite article D, cut the verb-object structure, and understanding not directly with the object clause. Passage: in inorganic chemistry a new challenge in the field is to understand the role of a transition metal catalyst in biochemical enzyme is called in.

Kết quả (Anh) 3:

Answer: A analysis: A, that common noun structure, pronouns, that of level in comparison with usage. B, C syntax errors, word segmentation with object not definite article D, cut open the verb object structure, and understanding can not be directly with the object clause. A new challenge in inorganic chemistry is to understand the role of transition metals in the biochemical catalyst called enzymes.