The famous professor’s lectures, though informal, are considered far more informative and

发布时间：2020-08-17 03:46:08

The famous professor’s lectures, though      informal, are considered far more informative and interesting.
A. occasionally
B. constantly
C. regularly
D. usually

网友回答

(答案→)A. occasionally
B. constantly
C. regularly
D. usually
解析：A. occasionally 偶尔，间或     B. constantly 不断地     C. regularly 定期地      D. usually通常地；句意：整个著名的教授的演讲，虽然有时候不正式，但是却被认为是更有教育性的和更有趣的。故选A
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