It remains __________ whether the medicine will work on the human body.
.—Why don't we just leave it until tomorrow? —________ I'm dead tired today.
—I forgot my mother's birthday! —________ Better keep it in mind next year.
—Would you mind giving me a lift? —________. I am happy to.
— I wonder if I could make a living by writing. —________?
—I hear you are to go to Tibet alone? —________. It's my dream to go on an adventure there.