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Section 8.5

Question Marks

Use a question mark to end an interrogativesentence.


Have past efforts to develop an AIDS vaccine been based onthe wrong approach?


Use a question mark to change a declarative orimperative sentence into a question.


Their testing of the system wasexhaustive? [declarative changed tointerrogative]

Start production on Friday? [imperative changed to interrogative]


When a directive or a command is phrased as a question, aquestion mark is optional.


Will you please send me a progress report by June10?

Will you speak to the vendor about the networkingproblems.


Use a question mark to indicate uncertainty about data.


The first synthesis was accomplished by Claude Poux(1810?-1897).


Do not use a question mark at the end of an indirect question.


James asked whether increasing the bandwidth of thenetwork's backbone would significantly increaseperformance.


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