Question

用might, could,can,must,can't填空。

1.1 can't find my concert ticket and I was anxious. My mother said I       leave it at school but forgot to bring it home. But I never took the ticket to school, so it      be at school. 

2. This morning someone helped me clean the classroom,but I don't know who did it. I think it be Lin Tao. He is warm-hearted and always helps the classmates. But I didn't see him this morning. Someone told me that he was ill at home today. So it       be him. Then,it       be Wang Lin. He is my best friend,and he       help me clean the classroom. I asked him and he said he didn't do that. I felt confused. 

3. Some students think the wallet       belong to Maria. But I think it       be Mary's because there is a photo of Jay Chou in the wallet. And she likes Jay Chou very much.

Answer 1

 1. might/could;can't 2. might/could/must;can't;might/could;might/ could 3. might/could;must