incumbent [ɪnˈkʌmbənt] (fml) adjective to be incumbent (up)on sb to do sthg spettare a qn fare qc incumbent [ɪnˈkʌmbənt] (fml) noun [postholder] titolare mf
Complétez la séquence avec la proposition qui convient. His sister's … at home, she's away. n't not is not