— You don’t look well, Don! You’d better see your doctor.— I ________, but he said there was nothing wrong.
—________you________that interesting story? —Yes,I have.I________it last week.
—Where is Mr.Chen? —He________the post office already.
You________the beauty of nature whenever you________here.
—Will she come to your birthday party? —________.
These boys had problems________to the top of that mountain.