One of the greatest benefits of Internet friendships is that they are based on common interest ________ appearance, age or popularity.
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A
in case of
B
in the form of
C
in spite of
D
instead of
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 We have _______ books in our library.
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A
plenty of
B
great many
C
a great deal of
D
great number of
. I don’t know          if she’s coming.
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A
at certain
B
for certain
C
with certain
D
on certain