He thoroughly understood the society __________.
A、Hethoroughlyunderstoodthesociety__________C
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GeneralMotors,oneoftheworld'slargestautomanufacturers,isexpandingits________inthiscountry.
Since William had been seriously ill for several months, his parents were worried about________ to return to school full-time.
Each year in the United States, many black teenagers _______ of school, either because they cannot keep up or they have to work to support their family.
________ to the papers is restricted to Defense Department personnel only.
Onlya(n)________fewwereinvitedtothedancingparty.