【C7】A．workB．companyC．jobD．organization

【C20】A．workB．buildC．keepD．retain

A．workB．playC．programD．pain

A．workB．workedC．working

【C8】A．workB．landC．lifeD．star

【C4】A．hospitalB．companyC．universityD．accommodation

【C5】A．workB．wakeC．sleepD．remain