My father works in the hospital. He is a ______.
Tony answered all the questions ________ the most difficult one.
—Miss Li, could you give meon English learning? —Certainly. First you should speak English every day.
They ________happily when the accident happened.
—Remember this, John.careful you are, mistakes you will make. —Thanks, Miss Rose.
---- is the population of your city? ----About two million.