The students in Grade Nine             their homework for more than three hours every day,

so they  _        have any time to play.          [ ]

A. were made to do, hardly        

B. are made to do, hardly          

C. were made do, hardly          

D. are made do, hardly

宽带综合业务数字网的协议分为3面和3层，3个层分别称为 【14】 、ATM层和ATM适配层。