改错题 18.The Anasazi settlements at Chaco Canyon were built on a spectacular scale, with more than 75 carefully engineered structures, of up to 600 rooms each, were connected by a complex regional system of roads.

A、 scale, with more than 75 carefully engineered structures, of up to 600 rooms each, were
B、 scale, with more than 75 carefully engineered structures, of up to 600 rooms each,
C、 scale of more than 75 carefully engineered structures of up to 600 rooms, each that had been
D、 scale of more than 75 carefully engineered structures of up to 600 rooms and with each
E、 scale of more than 75 carefully engineered structures of up to 600 rooms, each had been

【正确答案】 B

【答案解析】Logical predication; Grammatical construction
This sentence makes a claim about the scale (size, extent) of the Anasazi settlements and then illustrates that claim with a description of the settlements' structures. The second part of the sentence, introduced by the preposition with, describes the structures first in terms of their rooms and then in terms of the roads that connect them together. To describe the noun structures, the participial form connected should be used, turning the verb into an adjective.
A The verb were connected has no subject, since structures is the object of the preposition with.
B Correct. The sentence is logically coherent and grammatically correct.
C The comma preceding each makes each a subject, but it has no verb, since that is the subject of had been connected.
D This sentence suggests that the scale or size of the settlements is made up of structures, rather than uses the structures as an example of the settlements' grand scale; it also nonsensically indicates that: each room is connected by a complex system of roads
E This run-on sentence suffers from a comma splice, as the phrase following the comma is a main clause; the referent of the pronoun each is ambiguous.
The correct answer is B.