9. Since the Sun illuminates half the surface of the Moon, only half the surface __ can be seen from the Earth. Most Much With more At most 10. The novels of Constance Fenimore Woolson, __ have special interest for their regional settings. In a nineteenth -century writer A nineteenth -century writer The nineteenth -century writing Wrote about the nineteenth century

9. **At most**The correct answer is "at most". Since the Moon is tidally locked to the Earth (meaning the same side always faces Earth), even though the Sun illuminates half the Moon's surface, we can only see at most half of that illuminated half from Earth. We never see the entire illuminated half.10. **A nineteenth-century writer**The correct answer is "A nineteenth-century writer". This option correctly creates a concise and grammatically correct sentence. The other options create awkward phrasing or grammatical errors.