______( 不知道如何解决)the problem ,he turned to his

He tried his best to solve the problem,______ difficult it w to his disappointment,the opinion he had stuck to turned out He turned a deaf ear to the instruction given by his teacher 英语翻译他自己可以解决这个问题he ______ can solve the problem although he tired his best,he failed to work out the problem He tired his best to work out the problem and ( ) he finishe During the year the President turned his attention to ____ag This is the way ______ he thought of to solve the problem. A 帮我检查:He tried his best to solve the problem,( ) He tried his best to solve the problem,_______difficult it w He tried his best to solve the problem __difficult it was 为什 He tried his best to slove the problem,_A___difficult it was