The practice of hanging clothes across the street is a common_____in many parts of the city.
Yesterday, I came across my former classmate, but his name ______ me, which made me embarrassed.
If Joe's wife doesn’t go to the party, ________.
——Did Tom come back late last night? ——No. It was not yet 8 o’clock ____ he arrived home.
Our school has about 100 computers, but only sixty percent ____ used regularly.
Imagine how excited we were ____ that our schoolmates had been admitted to some famous universities.