—Your brother’s never careless, _______ he?—_______ , he often makes mistakes.
The boss makes the workers ________ long hours every day.
—________ 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.