求助！关于VERBAL REVIEW 18-262

DannnnnyZhu · 发表于 2018-3-14 11:19:54

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.
(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

答案是B。
我选的是C。
ADE都能排除，但是有几点比较困惑：
1）为什么在这里一定要用过去完成时？
2）此题中 landings 到底是可数还是不可数？如果看作是production的话，为什么landing后面要加s？如果是可数的话为什么用less than？

希望大家一起讨论一下。

danyuchn · 发表于 2018-3-14 13:43:10

有by 1920，強調了在另一過去時間之前，所以須用過去完成式。

DannnnnyZhu · 发表于 2018-3-15 00:12:59

danyuchn 发表于 2018-3-14 13:43
有by 1920，強調了在另一過去時間之前，所以須用過去完成式。

好的！谢谢你的回复~

Sherryweng · 发表于 2018-11-23 18:07:27

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求助！关于VERBAL REVIEW 18-262

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