OG19 CR新题求教

Mamba_SYC

To estimate the expansion rate of the universe is a notoriously difficult problem because there is a lack of a single yardstick that all distances can be measured by.

• ATo estimate the expansion rate of the universe is a notoriously difficult problem because there is a lack of a single yardstick that all distances can be measured by
• BEstimating the expansion rate of the universe is a notoriously difficult problem because there is no single yardstick by which all distances can be measured
• CBecause there is a lack of a single yardstick to measure all distances by, estimating the expansion rate of the universe is a notoriously difficult problem
• DA notoriously difficult problem is to estimate the expansion rate of the universe because a single yardstick is lacking by which all distances can be measured
• EIt is a notoriously difficult problem to estimate the expansion rate of the universe because by no single yardstick can all distances be measured
  

我在B和E里二选一选错了，答案是B，别的论坛有人说E选项because后面句意不对，但我怎么感觉B和E句意一样呢？都是没有一种统一的yardstick能度量所有的distances

eternatea

"There is no single"vs "By no single"
E 暗示 有很多yardstick但其中沒有任何一個符合標準

Xinyi720

从gmatclub上面搬运过来的-- 感谢SSM700plus

To estimate the expansion rate of the universe is a notoriously difficult problem because there is a lack of a single yardstick that all distances can be measured by.

(A) To estimate the expansion rate of the universe is a notoriously difficult problem because there is a lack of a single yardstick that all distances can be measured by.
To estimate is incorrect - in the current sentence usage.
a lack of a single yardstick - can be written precisely as "no single yardstick". Incorrect

(B) Estimating the expansion rate of the universe is a notoriously difficult problem because there is no single yardstick by which all distances can be measured.
Gerund at the start of sentence is acceptable. It correct all the errors in A.

(C) Because there is a lack of a single yardstick to measure all distances by, estimating the expansion rate of the universe is a notoriously difficult problem.
there is a lack of a single yardstick - can be written precisely as "no single yardstick" Incorrect

(D) A notoriously difficult problem is to estimate the expansion rate of the universe because a single yardstick is lacking by which all distances can be measured.
It distorts the original meaning of the sentence and presents ambiguous meaning

(E) It is a notoriously difficult problem to estimate the expansion rate of the universe because by no single yardstick can all distances be measured.
by no single yardstick can all distances be measured - Makes it incorrect

IMO- B

Xinyi720

话说我自己做这道题的时候思路满奇葩的诶，我当时立刻想到了一个遇见过的题 感觉前半句考点一样

"Estimating the expansion rate of the universe" is a problem
"Obtaining an investment-grade rating" will keep
两个都是一个action作为主语,然后巴拉巴拉
-感觉gmat蛮喜欢这样的格式，而且感觉也比E那个it is..简洁吧 (欢迎拍砖！)

Obtaining an investment-grade rating will keep the county's future borrowing costs low, protect its already-tattered image, and increase its ability to buy bond insurance.

(A) Obtaining an investment-grade rating will keep the county's future borrowing costs low, protect

(B) To obtain an investment-grade rating will keep the county's future borrowing costs low, and protect

(C) Having obtained an investment-grade rating will, in keeping the county's future borrowing costs low, protect

(D) To obtain an investment-grade rating would keep the county's future borrowing costs low, protecting

(E) Obtaining an investment-grade rating, keeping the county's borrowing costs low, would be protecting