—Is Mike a diligent student?  —No，but he is a lazy one，if   ___         ．

Do you like to watch the advertisements on TV if _________?

—Can I use your e-dictionary?  — Sorry. I don’t have ______.

To save class time, our teachers has _____ students do half of the exercise in class and complete the other half for our homework.

---When shall I call, in the morning or afternoon?----___. I’ll be in all day.