All his attention ___on the novel. so he didn't even notice the teacher come in. A has been fixed B was fixing C was fixedD fixed答案：C为什么不选A什么时候主从句时态一致?什么时候用完成时?

The writer and his books __(know)to us all. with all his attention fixed on the computer games the boy didnt notice his mother coming in 为什么不用fixing Attention,please!All mobile phones must __ during the meeting.选项A turn B be turned off C are turn After the meeting,Peter turned his __ to the task at hand.A:energy B:emphasis C:attention D:direction 为什么下面后半句独立主格要用过去分词,即attention要用被动吗?Jim was listening attentively to the lecture,all his attention fixed upon it . Why don’t you bring __ to his attention that you are too busy to do it.this what that it? Jack could not make himself __ attention to because his classmates made so much noise.a.to payb.paidc.payd.paying Do we have to go through all this __ tape to get his permission? He __ all his money to buy a bikea.savedb.spentc,maded.earned in the own ,on his own ,of the own,all his own有什么区别?例题：How did he finish his work ----I hear he did it __ __ __ He devoted all his efforts __ children.A.to educating B.educate C.education D.to educational he and his friends are talking about all their __ at their school (festival) 求横线中的答案, he and his friends are talking about all their __ at their school (festival) 用（）中的适当形式填空 When all those present(到场者)__ he began his lecture.A.sit B.set C.seated D.were seaed __(give)more attention,the trees could have grown better. The bike to __ we paid attention was sold. With his attention ___ on the book he was reading ,he didn't notice what had happened.With his attention __ on the book he was reading ,he didn't notice what had happened.A.focuses B.focused C.to focus D.focusing 为什么?请详细说明每个选项 attention