1.__of pottery is dependent on the durability of clay after firing.
To make
The making
When to make
It is making
iron， wrought iron， and steel contain iron carbides made up of __ of carbon.
amounts are different
different amounts that
different amounts
which amounts are different
Arctic fox is found throughout the Arctic ， usually on tundra or mountains __ the sea.
by which near
near of
because near
near
midge __ to any of several species of small flies， refers to a mosquito－like insect with slender wings and body， long legs， and antennae.
which a term applied
a term applied
is a term applied
applied a term
5. The face is the most __ of a human being.
part is distinctly
distinction in part
distinctive part
part of distinction
chemical facts __ as a by－product of their search for gold became the basis for modem chemistry.
that had been accumulated by alchemists
were accumulated by alchemists
alchemists accumulating them
had been accumulated by alchemists
fluoroscope makes __ for medical doctors to view a silhouette of the bones and internal organs of a patients body.
being possible
possibly
it is possible
it possible
second－oldest continuously occupied governors mansion in the United States __ Jackson， Mississippi.
the location in
is the location
is located in
located in
9.A television camera produces an image by convening __ receives into a series of bright and dark dots.
and it
it
what it
that it
so－called nonfiction novels， a documentary style is combined with fictional techniques __actual events and people.
that they describe
to describe
and in describing
are describing
gers often receive considerable training in the technical aspects of their jobs __ very little in the people management aspects.
so
just as
yet
and that
s of fertile soil called deltas， usually __ are formed by mud deposited at the mouth of a river.
triangular in shape
their shape is triangular
they have a triangular shape
triangular shape
gh a respected educator， Alexander Graham Bell __ the inventor of the telephone.
as is best known
best known as is
is best known as
best is known as
14. Not until the First World War __ to improve the road system in the United States.
a determined effort was made
made a determined effort
when a determined effort was made
was a determined effort made
15. Often invisible， always in motion， gas is __ of matter.
the state is most energetic
stating the most energetic
the most energetic state
the state that most energetic
