As he was __________ tired, he couldn't help __________ the housework.
---Do you mind my taking the books away? ---________.
—Who______ it be that is knocking at the door? —It ______ be Father, but I’m not sure.
The reason for his success is ______ he worked very hard.
-How do you like our restaurant?-I can’t find a ________one.
The manager meant _______the workers that being 5 minutes late meant____ the company.