Atlantic City, New Jersey
In the early part of the 20th century, Atlantic City went through a radical building boom. Many of the modest boarding houses that dotted the boardwalk were replaced with large hotels. Two of the city's most distinctive hotels were the Marlborough-Blenheim Hotel and the Traymore Hotel.
What replaced many of the modest boarding houses? 
large hotels
Many of the modest boarding houses that dotted the boardwalk were replaced with large hotels.
the modest boarding houses