－I knocked over my coffee cup. It went right over ______ keyboard.

－You shouldn't put drinks near ______ computer. [ ]

A. the; 不填

B. the; a

C. a; 不填

D. a; a

认真阅读给定资料，从三个方面分别用简短的语言归纳传媒低俗化现象愈演愈烈的原因。总字数控制在150字左右。