He suddenly became ____that he was the only person who wasn't dressed formally at the reception.
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To ____this new product into the European market, the company gave away 10,000 free samples to the local consumers to try.
He had kept up ____with his friends for many years, but all of a sudden, he stopped writing to them.
Your responsibility for the failure of the plan is only ____. Your partner should also take responsibility.
The court made a huge mistake in sending a(n) ____man to jail; he was put into prison for 10 years for doing nothing wrong.