Smallpox, a kind of disease, has now died ________.
______ many times, he finally understood it.
Going on a trip into ______ space must be quite ______ exciting experience.
— I need to advertise for a second-hand mountain bike.— _______?David just plans to sell his present one.
According to a report, cigarette smoking____ in all indoor public places in China already.
—Don’t forget to go to the football match tomorrow.—I ________.