--- What ________ useful book ! ---Yes, it is. But I found___________ difficult for me to read.
—________ will you come back from your work, Dad?—In about half an hour, dear.
There _______an important meeting this afternoon. All of you should attend it.
There are three ________ students in their school.
It’s polite ________ the old. We should learn from you.
This basket is ________ than that one. You can carry the light one.