Although he was not very confident ,but he accepted his friend's concentrasion to swim across a river.是concentration，这个词应作何理解？

Although he was rich,__ he is not happy.为什么不用连词? Although he was badly hurt,he ___ explain what had happened.a、couldb、mightc、was able tod、could not ALthough he was in trouble ,----he did not ask for help.A.and B.but C.so D./为什么? Although the work was not difficult,yet he didn't know how to do后要加It吗 Although he tried,he could not make it. Although he was not very confident ,but he accepted his friend's concentrasion to swim across a river.是concentration，这个词应作何理解？ Although God is know everything,but he is not hatefull. ______a solution to the technical problem,he was determined not to give up his plan.A.Although he has not found B.Not having foundb a和b有什么区别? （）it was snowing,（）it was not very cold A.although;but B.although;howeverC.though;but D.though When he was a child,he left home.Until it became the home of old talent,although his accent has not changed,but his family did not know him.翻译翻译 It was not that he was Although he was young,he took good care of his brother.(保持句意)Although he was young,he ____ ____ his brother very well. Although/Though he was exhausted,(still) he kept on working still 为什么放在he前面~ 改错:although he is not very paitent,but he is kind to me这句话改错...although he is not very paitent,but he is kind to me ___ he was only 31,he became the richest man in the world.(although/though) Although he was ill yesterday,he went on working.(用but改写) He kept on working without rest.He was very tired.(用although连句) Although he was ill yesterday,he went on working.(用but改写)