．You’d better get the problem solved as soon as possible ______ it becomes out of control

hashe lived in Canada –Since 1998.

f there is no scientific proof secondhandsmoke causes cancer, there is no reason why nonsmokers should be forced to takethis risk.

What about your self-drive trip yesterday?—Tiring! The road is being widened, and we ______ a rough ride

our city tries impatiently to change itsappearance by tearing down old buildings, more and more citizens are suggestingways to ___________ the historically important architecture