--What is that on the table?  --Oh, a set of ___________ on the table.
#43644
A
key is
B
keys are
C
keys is
D
key are
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There _______ a meeting tomorrow. 
#44096
A
will be
B
is will be
C
is will
D
will have
Every means     , but none proved      .
#85757
A
have tried; a success
B
have been tried; successful
C
has tried; to be successful
D
has been tried; successful