question: to begin your free file analysis, simply drag-and-drop your x3dv file inside the dotted lines below, or click "browse my computer" and select your file.
Capitalize this past sentence correctly.
A: To begin your free file analysis, simply drag-and-drop your X3DV file inside the dotted lines below, or click "Browse My Computer" and select your file.

question: the polymeric material is, of course, highly resistant to corrosion.
Capitalize this past sentence correctly.
A: The polymeric material is, of course, highly resistant to corrosion.

question: 2:42 and as the toes of the feet were part of iron, and part of clay, so the kingdom shall be partly strong, and partly broken.
Capitalize this past sentence correctly.
A: 2:42 And as the toes of the feet were part of iron, and part of clay, so the kingdom shall be partly strong, and partly broken.