The wealth of a country should be measured _____ the wealth and happiness of its people as well as the material goods it can produce.
—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.
. I am looking through the composition he just finished ___ the possible mistakes in it.