The passage below contains a blank indicating a missing punctuation mark. Fill in the blank with the punctuation mark that correctly completes the sentence, maintaining consistency with the punctuation already used to set off the nonessential clause.
Cevap:In 1967, astrophysicist Jocelyn Bell Burnell detected a series of repeating radio signals—initially dubbed 'Little Green Men' as a joke【—】that turned out to be the first discovered pulsar.
Cevap
An em dash (—) or double hyphen (--) must be used to close the nonessential parenthetical phrase.
The sentence uses an em dash (—) to open the nonessential parenthetical phrase 'initially dubbed "Little Green Men" as a joke'. Under standard punctuation rules tested on the ACT, nonessential phrases set off by dashes must be closed with a matching dash. Therefore, an em dash (—) or its keyboard representation (--) is required to correctly complete the sentence.
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Anahtar Kavram
Punctuation consistency with parenthetical elements requires using matching marks (dash with dash, comma with comma, parenthesis with parenthesis) to set off nonessential information.
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