—Who______ it be that is knocking at the door?
—It ______ be Father, but I’m not sure.

Mary __________ the job he offered to her, but she didn’t.

—Hi, Johnson, any idea where Susan is?
—It's class time, so she       in the classroom now.

I ______ her, but I never could.

Helen ______ go on the trip with us, but she isn’t quite sure yet.

I was really anxious about you. You _______ home without a word．

— I haven’t got the reference book yet, but I’ll have a test on the subject next month.
— Don’t worry. You ________ have it by Friday.

After hours of repair, the driver tried to start the machine but it _________ work.

— I want someone to write the composition for me.
　— No! It’s a rule in our school that as a student, you _______ depend on yourself.

I _____ have watched that movie --- it’ll give me horrible dreams.