According to the American________，presidential elections are held every four years．
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Footsteps________ his return．
He went back home without having________ any success．
He________ several interesting plans．
Honesty is an important_________ in anyone's character．
Which________ of toothpaste do you prefer？
In Western countries，parliament is the chief _________ of the government．
I will________ for John to meet you at the airport．
Millions of American soldiers fought________ in World War'Ⅱ．
It is impolite to inquire of_________ affairs of others．