The decline and fall of the Roman Empire remains a topic of vigorous debate to this day; historians...

题目信息

The decline and fall of the Roman Empire remains a topic of vigorous debate to this day; historians have attributed it to a variety of causes, including military insurrection, ethnic conflict, and widespread immorality.

A:have attributed it to a variety of causes, including military insurrection, ethnic conflict, and

B:attribute it variously to causes that include military insurrection, ethnic conflict, or

C:have variously attributed them to causes which include military insurrection, ethnic conflict, and

D:attribute them to various causes, including military insurrection, ethnic conflict, as well as

E:variously attribute them to causes including military insurrection, ethnic conflict, and

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正确答案： A:have attributed it to a variety of causes, including military insurrection, ethnic conflict, and

1.remains，所以只能是it，排除CDE

2.The decline and fall of the Roman empire is a noun phrase(one big noun). It is a singular subject. Hence, in the attributed X to...X should be singular since it refers to a singular subject. C,D,E out.

Between A and B, the variously in B changes the meaning of the sentence.

Hence, A is the correct answer.

笔记