Complete the passage by choosing the correct answer A, B, C or D

Ex 7. Complete the passage by choosing the correct answer A, B, C or D.
a) Paper can be recycled by reducing it to pulp and (1)_
recycling process (2)
it with pulp from newly harvested wood. As the
the paper fibers to breakdown, each time paper is recycled its quality decreases. This
means that (3) a higher percentage of new fibers must be added, or the paper down cycled (4)_
quality products. Any writing or coloration of the paper must first be removed by deinking, which (5)_
lower
fillers, clays, and fiber fragments.
removes
Almost (6)
paper can be recycled today, but some types are harder to recycle (7)
with plastic or aluminum foil, and papers (8)_
the process is too expensive. Gift wrap paper also cannot be recycled (10)
1.
A. including
C. gathering
2.
A. makes
C. results
A. either
C. both
A. out
C. into
A. only
C. even
A. all
C. a lot
A. as
C. than
A. they
C. those
A. but
C. so that
A. due
C. together
3.
4.
5.
6.
7.
8.
9.
10.
B. combining
B. forces
B. neither
B. within
B. also
B. some
B. like
B. these
B. because
B. apart
others. Papers coated
are waxed, pasted, or gummed are usually not recycled (9)
to its low quality.
D. joining
D. causes
D. between
D. above
D. as well
D. much
D. more
D. that
D.
though
D. in addition