The reporter has written__________articles about air pollution hoping to call the attention of all

people to the problem.[ ]

A. a series of  

B. a great deal of

C. a plenty of  

D. a large amount of

如果一个学生的学习动机主要是获得教师和家长等的赞许和同伙的接纳．这属于( )

A．认知内驱力

B．附属内驱力

C．内在内驱力

D．能力内驱力