A．insistingB．perseveringC．persistingD．requiring

【C13】A．orderedB．askedC．putD．required

A．askedB．bornC．meantD．required

【C17】A．RequireB．RequiringC．To RequireD．Required

A．revealB．reviseC．resembleD．require

【C6】A．orderedB．askedC．insistedD．required

【C3】A．regulationB．climateC．circumstanceD．requirement