Look round when you cross the street . 2. When she heard the news , she burst into laughter. 3. As she was still rather weak , she could not stay up for too long. 4.Gentlemen always shake hands when they are introduced to each other. 5.A cold rain was falling. It was mixed with snow. 6. While we were walking in the street , we met some friends of ours . 7.The old man walked slowly. He was supported by his little grandson . 8 .The ground which is covered with white snow looks very beautiful. 9.There is a tall tree which covers the entrance to the cave . 10.The worker wrote to the police and disclosed who stole the mone