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Around 1900, fishermen in the Chesapeake Bay area landed more than seventeen mil
Around 1900, fishermen in the Chesapeake Bay area landed more than seventeen mil
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2025-02-25
27
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问题
Around 1900, fishermen in the Chesapeake Bay area landed more than seventeen million pounds of shad in a single year, but by 1920, overfishing and the proliferation of milldams and culverts
that have blocked shad migrations up their spawning streams had reduced landings to less
than four million pounds.
选项
A、that have blocked shad migrations up their spawning streams had reduced landings to less
B、that blocked shad from migrating up their spawning streams had reduced landings to less
C、that blocked shad from migrating up their spawning streams reduced landings to a lower amount
D、having blocked shad from migrating up their spawning streams reduced landings to less
E、having blocked shad migrations up their spawning streams had reduced landings to an amount lower
答案
B
解析
Diction; Verb form
The point of this sentence is to explain how overfishing and interference with shad spawning streams affected the size of shad landings. The sentence makes this point by comparing the sizes of annual landings before and after 1920. The sentence most efficiently compares the poundage of pre- and post-1920 landings with the comparative form [from] more than... to less than....
A The present-perfect tense of have blocked inappropriately describes an event that caused something to happen before 1920. In addition, migrations up their spawning streams is incorrect.
B Correct. The comparison of poundage is efficiently explained, and the sequence of tenses makes sense. Despite a possible superficial appearance of a comparison between countable things (pounds), less is more appropriate than fewer for the comparison. The fishermen landed different amounts offish; they did not land the number of pounds in terms of which those amounts are measured.
C The comparative expression to a lower amount is unnecessarily wordy. The past-perfect form had reduced would make the temporal relationships somewhat clearer than does the past tense reduced.
D The present-perfect participial phrase, having blocked... streams, should be set off in commas; as it stands, it does not make sense. The past-perfect form had reduced would make the temporal relationships somewhat clearer than does the past tense reduced.
E The present-perfect participial phrase must be set off with commas; the pronoun their, which is also in (A), nonsensically refers to migrations, and the comparative expression to an amount lower is unnecessarily wordy.
The correct answer is B.
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