We can’t _____ other countries in trade if we don’tdevelop our national economy.

Many scholars share the belief that interest is as _____ to learning as the ability to understand, even more so to some degree.

Because of the snow , many parts of the countryside are only _____ by helicopter.

t know this was a one-way street,officer.

There is no doubt ________ those who work hard will succeed sooner or later