1. You're a student. I'm a student, too. (合并成一句)
     __   _ you ____  I are students.
2. American fast food seems to be the most popular in the world. (改为同义句)
       ___   __ _   that American fast food is the most popular in the world.
3. After he said these words, he went out of the room. (改为同义句)
       _  __ these__   _, he went out of the room.
4. Something is wrong with him. (改为否定句)
      __  _ is ___    wrong with him.
5. You'd better finish your homework today. (改为否定句)
    You'd____     ___ your homework today.