①some students ran back to the dormitory,magazines__under th
①some students ran back to the dormitory,magazines__under their arms.A,held B,holding
B为什么不对?
B不能表示正在夹着,边夹着边跑回宿舍吗.
②I like to get up early so that I can get plenty of work__before lunch
A,to do B,done
A为什么不对?