Which sentence uses a verb that agrees with its subject?
a.
perry, like his younger sister pauline, write very neatly.
b.
the exhibits on the lower level is not currently open to the public.
c.
the emergency lights atop the fire trucks were flashing.
d.
that man wearing sunglasses seem to be an undercover police officer.

The greatest gift the sumerians gave the world was the invention of writing. the sumerians were wealthy people. they needed some way to keep track of what they owned. they began drawing pictures. they used a reed as a pen. they drew on soft pieces of clay. the soft clay was then dried in the sun. the tablet became a permanent record. later, the sumerian drawings changed into wedge-shaped symbols. this kind of writing is called cuneiform. by putting symbols together, the sumerians could write entire sentences.