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Thedash (-) is a flexible punctuation mark that the GMAT occasionally employs. Youcan use a dash as an emphatic comma, semicolon or colon. Right: By January 2,2000, the so-called "Y2K problem" was already widelyconsidered a joke - although the reason for the non-event was the hugecorporate and governmental investment in prior countermeasures.
Inthe case above, either a comma or a dash would be correct. Sometimes, a dash ispreferred. For instance, you should use dashes to separate an appositive froman item in a list
Right:My three best friends - Danny, Jimmy, and Joey - and I went skiing. If you used commas in this sentence, you might think that seven people weregoing skiing.
You can also use the dash to restate or explain an earlier part of the sentence.Unlike the colon, the dash does not need to be immediately preceded by the partneeding explanation.
Right: Post-MBA compensation for investment bankers tends to surge far ahead of thatfor management consultants - by tens, if not hundreds, of thousands of dollarsa year.
The phrase after the dash (by tens ... a year) explains the word far in the phrasefar ahead. In comparison, a colon would not work so well here.
Inshort, you cannot really go wrong with a dash!
【中文版-强烈建议看英文原版】 4、破折号DASH (1)破折号的用法很富有弹性，既可以作强调作用，也能充当冒号，分号。 (2)有时候为了突出主要内容或者解释时，破折号更佳。 (3)破折号还可以重复或者解释前半句的内容。但又和冒号不同，破折号不一定立刻放在被 解释内容之后。 (4)用的比较广泛，破折号有双的，也有单的。
请重点关注一下例题中破折号的使用。
例题均引自OG18/prep [答案回复可见]
A mixture of poems and short fiction, Jean Toomer's Cane has been called one of the three best novels ever written by Black Americans—the others being Richard Wright, author of Native Son, and Ralph Ellison, author of Invisible Man
A.Black Americans—the others being Richard Wright, author of Native Son, and Ralph Ellison, author of Invisible Man
B.Black Americans—including Native Son by Richard Wright and Invisible Man by Ralph Ellison
C.a Black American—including Richard Wright, author of Native Son, and Ralph Ellison, author of Invisible Man
D.a Black American—the others being Richard Wright, author of Native Son, and Ralph Ellison, author of Invisible Man
E.a Black American—the others being Richard Wright's Native Son and Ralph Ellison's Invisible Man
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OA: E
Some anthropologists believe that the genetic homogeneity evident in the world’s people is the result of a"population bottleneck" -- at some time in the past our ancestorssuffered an event, greatly reducing their numbers and thus our geneticvariation.
A at some time in the past ourancestors suffered an event, greatly reducing their numbers
B that at some time in the past our ancestors suffered an event thatgreatly reduced their numbers
C that some time in the past our ancestors suffered an event so thattheir numbers were greatly reduced,
D some time in the past our ancestors suffered an event from whichtheir numbers were greatly reduced
E some time in the past, that our ancestors suffered an event so as toreduce their numbers greatly,
OA: B
[感谢大大龟的补充] Archaeologists in Egypt have excavated a 5,000-year-old wooden hull that is the earliest surviving example of a “built” boat—in other words, a boat constructed out of planks fitted together—and that thus represents a major advance, in terms of boat-building technology, over the dugout logs and reed vessels of more ancient vintage.
A together—and that thus represents
B together—and this has represented
C together, and it represents
D together that was representing
E together to represent
from prep07test1
key: A
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发表于 2018-2-24 14:08:32
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