Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer in each of the following questions.
He's sometimes bad-tempered but he's a good fellow ______.
Giải chi tiết:
at heart (= used to say what sb is really like even though they seem to be sth different): theo cách cơ bản nhất. "He' sometiems bad-tempered but he's a good fellow at heart." (Thỉnh thoảng anh ấy nóng nảy nhưng về cơ bản, anh ấy là người tốt.)