从方框中选择适当的词语填空,其中有一个词是多余的。 must be. can be, can't be, belong to, final, owner 1. The bike _______ your father's or your mother's. They both have a black bike. 2. This homework Jim's. He wasn't at school today. 3. Can you help us to find the __ of this red backpack? 4. The blue sweater ___ _ my sister. She is the only one who likes blue best in my family. 5. This is our exam in our school. After that we will graduate.