Answer :
Over 1000 people tried out for a spot n the new reality television show; in fact, many of the contestants stood in line for over ten hours. :)
Over 1000 people tried out for a spot on the new reality television show; ________________, many of the contestants stood in line for over ten hours waiting for their turn.
The Answer will be In fact
Why In fact?
The above lines were describing a situation, where the person is saying that 1000 people tried out for a spot in the new reality show, and to add on the point and describe the situation furthermore, in fact, must be used
The other options are not relevant because although,nevertheless and in meantime are not describing the situation properly.
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