Sentence:  The widespread purge that has taken place the past twelve months or so among Communist leaders in the provinces gives assurance that the party officials who will dominate the Congress , and the Central Committee it will elect , will all have <WSD>passed</WSD> the tightest possible Khrushchev screening , both for loyalty to him and for competence and performance on the job . 
Meaning of the word marked with <WSD> tags:  go successfully through a test or a selection process