根据短文,判断正误,正确的写“T”,错误的写“F”。 One day, my friend Tim was walking in the street. Then he heard a boy crying. The boy stepped(踩到) on a piece of a banana skin(皮) and fell to the ground. Tim walked up to the boy and said, “Don’t cry. Let me help you stand up.” The boy stopped crying and stood up. He was happy again. ( )4.The boy was happy because Tim helped him.