Where ____ all the boys ____?

The correct option to fill in the blanks in the sentence "Where ____ all the boys ____?" is:

B. have, gone

Explanation:

• "has, gone": "Has" is used with singular subjects. Since "all the boys" is a plural subject, "has" is not the correct choice.

• "have, gone": This is the correct option. "Have" is used with plural subjects, and "gone" is the past participle form of "go," which is needed after "have" to form the present perfect tense. The sentence implies that the action (the boys going somewhere) has relevance to the present moment.

• "did, went": "Did" is the past tense auxiliary verb used for forming questions in the simple past tense. However, "went" is already the simple past tense of "go," so using "did" with "went" is grammatically incorrect.

• "does, go": "Does" is used with singular subjects in the simple present tense, and "go" is the base form of the verb. Since the subject is plural ("all the boys") and the sentence implies a completed action, this option is incorrect.

So, "Where have all the boys gone?" is the grammatically correct sentence.