It stood twelve feet tall, weighed nine thousand pounds, and wielded seven-inch claws, and Megatherium americanum, a giant groun

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问题 It stood twelve feet tall, weighed nine thousand pounds, and wielded seven-inch claws, and Megatherium americanum, a giant ground sloth, may have been the largest hunting mammal ever to walk the Earth.

选项 A、It stood twelve feet tall, weighed nine thousand pounds, and wielded seven-inch claws, and Megatherium americanum, a giant ground sloth,
B、It stood twelve feet tall, weighing nine thousand pounds, and wielding seven-inch claws, Megatherium americanum was a giant ground sloth and
C、The giant ground sloth Megatherium americanum, having stood twelve feet tall, weighing nine thousand pounds, and wielding seven-inch claws, it
D、Standing twelve feet tall, weighing nine thousand pounds, and wielding seven-inch claws, Megatherium americanum, a giant ground sloth,
E、Standing twelve feet tall, weighing nine thousand pounds, it wielded seven-inch claws, and the giant ground sloth Megatherium americanum

答案D

解析 Grammatical construction; Parallelism
The point of the sentence is to describe several features of Megatherium americanum, to identify this creature as a giant ground sloth, and to speculate about its status as the largest hunting mammal in Earth’s history. Megatherium americanum is therefore the sole subject of the sentence. When its features are presented as parallel adjective phrases and its common identification is presented as an appositive, a single main verb may have been is all that is required to complete the sentence. When the conjunction and constructs a compound sentence, the subjects it and ground sloth or Megatherium americanum appear to name separate entities.
A The compound sentence structure suggests that it and Megatherium americanum are two separate entities, making it unclear what, if anything, the pronoun refers to.
B As in (A), it and Megatherium americanum appear to name different entities. This a run-on sentence; the comma after claws is not sufficient to join the two main clauses in a single sentence. The series describing the sloth is also nonparallel.
C The present-perfect tense of the first participial phrase in the series {having stood) is not parallel with the (timeless) present tense of the other two participials. The introduction of the main subject it leaves ground sloth without a verb.
D Correct. The series of present-tense participial phrases describes the main subject, Megatherium americanum, which is clarified by the common name expressed as an appositive.
E The identity of it is ambiguous, and the second subject of the compound sentence giant ground sloth appears to name something other than it. This makes the sentence ungrammatical.
The correct answer is D.
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本试题收录于: GMAT VERBAL题库GMAT分类
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