----Who______ it be that is knocking at the door? ----It ______ be Father, but I’m not sure.
Lucy has got into a situation in her study______ she finds it hard to go further.
The fact _______she had not said anything _______all of us.
Nobody except Bill and John ______ entered the second round of the interview.
–What has made him upset recently? --________alone to face a troublesome milk case.
Had Tom taken medicine just as the doctor said yesterday, he_______ quite right now.