Topic: Conjugation of Verb,

Best Answer Explained in Below-:

In the question, "How many eggs have our hens -- this month?", the blank requires a past participle form of the verb "to swear." The correct answer is B) sworn.

To understand this, it's essential to know how verbs change form based on their use in a sentence. The verb "swear" has several forms: the base form is "swear," the past tense is "swore," and the past participle is "sworn." In this context, the phrase "have our hens" indicates that we are using the present perfect tense, which is formed using "have" along with the past participle of the verb.

Since "sworn" is the past participle of "to swear," it fits perfectly in the sentence structure. The other options do not work: "swore" is the simple past tense needed for past actions without auxiliary verbs, "sworne" is not a correct English form, and "swear" is the base form, which does not fit in a perfect tense construction.

Therefore, the only grammatically correct and contextually appropriate choice is B) sworn.