Rewrite the sentences, replacing the phrases in bold type with the appropriate expressions in their proper forms. Example: They believe they have hit upon ( ) a system to help you deal with almost any challenge. They believe they have hit upon ( come up with ) a system to help you deal with almost any challenge. I don’t mind ( 1 ) if you want to keep it secret. But I think you ’d better ( 2 ) tell her father the truth. He will find out soon anyway. I can assure you ( 3 ) that they are very much attached to each other. They will never divorce ( 4 ) . In this famous battle, Zhou Yu and Zhuge Liang hit upon the same idea ( 5 ) —to destroy the enemy warships by setting them on fire. I decided to tell him about my trouble. He had always been loyal to his friends. I knew that he would be glad to help me ( 6 ) . If things go on like this, we are sure to have to face a thirsty future. Therefore we must do everything we can to save our water resources in the interests of our children’s welfare ( 7 ) . My grandson bought me an air-conditioner. I know that he is concerned for my health ( 8 ) , and I appreciate it. When we think of our country in all of its aspects ( 9 ) , I think we are still far from being a world power. I have heard him complain about our dining-hall food often. Now he’s doing that ( 10 ) again. There is always room for improvement of course in our school management, but we, on the other hand ( 11 ) , shouldn’t be too hard to please. When the early settlers first came to America, life was extremely hard. And everybody, men and women, old and young, rich and poor, knew that they had to join hands and work hard together ( 12 ) in order to survive. He knew that he had hurt his brother’s feelings. He wished to do something to show that he was sorry ( 13 ) .