It’s quite of beginners to forget to use an article before a noun.
A. ordinary
B. usual
C. regular
D. typical
网友回答
A. ordinary
B. usual
C. regular
(答案→)D. typical
解析:.A.ordinary 普通的,B. usual通常的,C. regular定期的,D. typical典型的,这里用的是:It is typical of sb. to do sth.“某人做…是常有的事情”,句意:初学者在名词前面忘记用冠词的事情是常有的。选D。