The famous professor’s lectures, though ____ informal, are considered far more informative and inter...
2022-12-16 11:42:51 126次 2012-2013学年黑龙江齐齐哈尔实验中学高三三模英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
The famous professor’s lectures, though ____ informal,
are considered far more informative and interesting.
A．occasionally B．constantly C．regularly D．usually
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