Your backpack is in the________ case.

She finished _____ that book last Sunday.

What is the best way you think of ______ the environment?

Workers can’t be made ________ for twelve hours a day.

—I’m sorry I forgot      the letter for you! I’m really busy these days”
—It doesn’t matter, I’ll post it myself.”

We are busy__________ the final exams.

Do you have ____________ to say about your family？ 

Would you like ________ me how ________ after my bird?

All the students are busy _____ English in the morning.

You shouldn’t leave the door _____when you go out.