Which of these four excerpts from john milton poetry is in blank verse

Restore us, and regain the blissful Seat,

Sing Heavnly Muse, that on the secret top

Of Oreb, or of Sinai, didst inspire

That Shepherd, who first taught the chosen Seed,

In the Beginning how the Heav'ns and Earth (from Paradise Lost)

Explanation:

Blank Verse is a poetry where there are no rhyming words, and normally follows the iambic pentameter, a regular meter form. This form of verse writing allows for the writer to have an unrestricted freedom. Though without any rhyme, it still does have a poetic sound and a pattern.  

Restore us, and regain the blissful Seat,

Sing Heavnly Muse, that on the secret top

Of Oreb, or of Sinai, didst inspire

That Shepherd, who first taught the chosen Seed,

In the Beginning how the Heav'ns and Earth (from Paradise Lost)

"Paradise Lost" by John Milton is an example of blank verse. The opening of Milton's epic poetry utilizes the no rhyme scheme, but still have an iambic pentameter meter. Iambic pentameter is the presence of ten syllables in a line, with alternate stress and unstressed words. Also, there are no rhyming words in the end of the lines each, thus making it a blank verse.

it is an infinitive phrase with a subject.