He ___ ___ ___ ___ (应该)here in about an hour.
I had forgotten the date of the battle, so I r______ to a history book.
The poor man had a very unhappy ______(童年).
Three thousand ______(听众) crowded the concert hall.
The young couple are always ______(争辩) with each other about money.
We should care for the young and ______(尊敬) the elderly.