---It is worrying that the children are playing by the river, isn’t it?---___________
—I’ll come to see you this afternoon. Shall I bring something to read? —OK. ___.
—Hello, may I have an appointment with the headmaster? —_____.
—How would you like your coffee? —____.
—Can I help you, sir? —______.
—Is the experiment easy? —____. I’ll just do my bit.