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Total questions: 24
Worksheet time: 12mins
Fort Union was the site of what ... principal fur-trading post on the upper Missouri River.
the
being the
was the
it was the
Since ... commercial risk, it has to appeal to a large audience to justify its cost.
the face of the movie
moving faces
a movie faces
to face a movie
A current of water known as the Gulf Stream comes up from the Gulf of Mexico, and then ... the North Atlantic toward Europe.
it crosses
crossing
with its crosses
crosses it
Systems ... the two symbols 0 and 1 are called binary number systems.
use
they use
uses
using
Genes, ... the blueprints for cell construction, exist in tightly organized packages called chromosomes.
are
they are
which
which are
The Earth's atmosphere consists of gases ... in place around the Earth by the gravitational pull of the planet.
held
hold
it holds
the hold
Oscar Hammerstein II collaborated with a number of composers including Jerome Kern, whom ... in writing the musical Show Boat.
joined
was joined
he joined
joining
Modern humans, who first appeared about 600,000 years ago, ... Homo sapiens.
calling
were called
they called
they were called
The first writing ... evidence of is on Mesopotamian clay tables.
we
that we
has
that we have
Air near the equator ... a faster west-to-east motion than air farther from the equator.
to have
it has
has
having
The Moon's gravity pulls water on the near side of the Earth toward the Moon, and this is what ... tides to occur.
the cause
causes
causing
the cause of
... quickly after an animal dies.
In the degradation of DNA
Degrading DNA
DNA degrades
For DNA to degrade
..., they pick up fragments of rocks which become frozen into the base of the ice.
Glaciers move
Glaciers moving
They were glaciers
As glaciers move
... aerodynamic design has contributed greatly to reducing resistance to motion.
Improved
It improves
Improvement
They improve
Among geese ____ a highly elaborate form of communication.
occur
occurs
it occurs
they occur
_____ heated by solar energy have special collectors on the roof to trap sunlight.
A home is
A home
Homes are
Homes
What is wrong? Scientists at the medical center is trying to determine if there is a relationship between saccharine and cancer.
is trying
to determine
is
saccharine and cancer
One of the most powerful optical telescopes, the "Big Eye" at Mt. Palomar, ..... a two hundred - inch mirror.
has
that has
with
which
Most of the mirrors .... for scientific and technical purposes are now made by a method of vacuum evaporation.
used
use
that use
using
Roots of plants tend to grow downward into soil unless ... more readily available at the surface.
have water
water has
is water
water is
Beginning in the Middle Ages, composers of western music used a system of notating their compositions, ... be performed by musicians.
will
that
and when do
so they could
Most folk songs are ballads ... have simple words and tell simple stories.
what
although
when
that
William Samuel Jackson, .... helped write the constitution, became the first president of Columbia College in 1787
whom he had
ad he had
who had
had
Migraine headaches are more frequent among women .... among men
than
however
except for
as are
