Subject and Verb

Buckwheat flour ... the seeds of the buckwheat plant.

• is made from

• from

• it is from

• and

The state of Ohio ... name from an Iroquoian word meaning "great river".

• and its

• along with its

• it got its

• got its

Boston, the hub of historic New England, it is the capital of Massachussets and the largest city in the area.

• historic

• it

• capital

• the largest

Mixed seeds, such as cracked corn, peanuts, and sunflower seeds, is popular feed for winter birds.

• Mixed

• such as

• is

• feed

Unlike most capital cities, Brasilia it was constructed specifically to house government offices.

• most

• it was

• specifically

• to house

Borax, generally found in the desert, being useful as a water softener in the laundry industry.

• generally

• being

• as

• softener

After roosting all day in a dark cave, a bat leaves its shelter and spends the night hunting for their food.

• roosting

• leaves

• spends

• their

Modern buttons, unlike early ones, they are frequently mass-produced and usually made of plastic.

• they

• frequently

• mass-produced

• made of

The letter "B" probably it originated as a picture sign of a house.

• The

• probably

• it

• as

The Dambovita River, a tributary of the Danube, it runs through Bucharest.

• The

• tributary

• it

• runs through