The first African-American president of the United States received a（n） _____ welcome in the African countries, where he was received as a returning son．

I tried hard to get some information about the new technology out of his mouth,but he remained __________.

A cough is usually nothing to worry about unless it lasts for ten days ___.

—Which one of these two dictionaries do you advise me to buy, Oxford or Longman?—Well, take Oxford. I think it is the ________ of the two.

The little boy was            to go out alone.