Even if the US __________ do so, it __________ change the size of the US trade deficit.
________ the driver worn the seat belt, he _________now.
_______life in a new city can be hard, it can broaden a person’s view of the world.
I am wondering ___________ that comes first in the final exam.
Word came ________ a new railway station would be built in our city.
Not until Tom read his composition the second time ________ the spelling mistake.