He is unhappy because of his _________ . A. deaf B. deafen C. deafness D. deafeness
He is unhappy because of his _________ .
A. deaf
B. deafen
C. deafness
D. deafeness
Đáp án: C
Giải thích: Because of + N (phrase) / Ving, S + V (Clause)
Dịch: Anh ấy không hạnh phúc vì bị điếc.