If you are traveling___ the customs are really foreign to your own, please do as the Romans do.
Mr. John was always___the poor and the sick, often providing them with free medical care.
--- Jim, do you have the time? --- _______. --- Never mind. Thanks anyway.
In his address at two-day APEC Economic Leaders Meeting, President Hu _______ the APEC to reform itself to raise the efficiency of cooperation so as to keep advancing _______changing times.
His proposal is _______ to all of us and you do not need to tell us more about it.
I enjoyed very much the three years ______ it had taken me to study English at school.