_______ is the strength of union that all the difficulties, if any, can be dealt with.
—How was your recent trip to Sichuan? —I've never had __________ one before.
Mr. Black is very happy because the clothes made in his factory have never been __________.
—I heard the Backstreet Boys would sing at the New Theater. —Where did you __________?
—How could you __________ my sister so easily in the crowd? —Because she stood out in a red dress.
Singing and dancing, the children were __________ the park when it began to rain cats and dogs.