He has tried four times,but his teacher wants him to try___f

He has tried four times,but his teacher wants him to try___f He has tried four times,but his teacher wants him to try --f 题：He has failed three times,he wants to try（ ）time.A.four B. David has tried twice in the exam,but he still wants to try_ he has tried to make his mother (pay more attention to him.) He is a little weak in this ,but he has tried his best to ca the teacher tried to get the point __to his students but he I tried to persuade him but he remained______. he has been to england four times 对four times提问 he has been to China four times还是for four times The teacher wants him to correct his homework翻译 But his mother wants him to be a scientist and wants him to