根据所给的主题句及提示,写好段落的扩展句。 主题句:He was kind and shy before a group of naughty girls, but he was very strict in his teaching and with our students. 1 teach us—a lot in knowledge—as well as in morality 2 I remember—my final exam 3 have an idea—look in dictionary—secretly 4 unfortunately—discover—save my face 5 after exam—call—to his office—my heart—beat fast 6 instead of scolding—talk kindly—advise—do good—moved—tears 7 18 years—pass—keep—remind me—study hard—honest