【题目】During his speech, the professor always ______ that happiness is achieved through hard work.
A. underlined B. sharpened
C. switched D. refreshed
在线课程【答案】A
【解析】
考查动词辨析。句意：在他的演讲中，教授总是强调幸福是通过努力工作获得的。A. underlined强调；B. sharpened锐化；C. switched转变，切换；D. refreshed更新，使恢复。此处表示强调，故选A.