Did you have any difficulty _____ his house?

When _________ different cultures, we often focus our attention on the differences without noticing many similarities.

—Was the judge ______ with the result?—I don’t think so. But perhaps no judge is easy _______.

A harmonious society is like a symphony orchestra—each person contributes a small sound，but when ______ with other sounds，it becomes beautiful music.

 Oliver climbed up the hill _____ swimming in the cold weather.