Use of fear in and then there were none

It's timed! overpopulation can affect the natural environment • limiting land available for crops.• lowering the standard of living.• causing the destruction of forests.• worsening sanitation in cities.

Grammar: sequence of verp tenses quiz active the is used for an event that has been completed before the present moment in time. simple past past perfect perfect progressive past perfect progressive

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.