—He was nearly drowned in a pool.—Oh, when was ______ exactly?— It was in 1983 _______ he was swimming with his friends.
The old city wall ______ in the Ming Dynasty.
The doctors have done ______ they could ______the child.
The teacher asked the students ______ .
I don’t know where I ______ my dictionary, which cost me 50 yuan.
If you are traveling___ the customs are really foreign to your own, please do as the Romans do.