问题补充:
As soon as his teacher begins lecturing, he begins to doze off, not intentionally but .
A. personally
B. randomly
C. habitually
D. unconditionally
答案:
A. personally
B. randomly
(答案→)C. habitually
D. unconditionally
解析:考察副词词义辨析。A就个人而言;B胡乱地;C习惯地;惯常地;D无条件地;句意:老师一开始上课,他就开始打瞌睡,这不是有意地,这是他习惯如此。根据句意说明c 正确。