.---Let me help you cross the street.-- ______ ! I’m not that old.
Is this research center _____ the foreign guests visited last week?
They started early that morning in order that they_____ there before noon.
Mary cares about clothes too much, and she _____ too much money _____ clothes.
"_____ of them are not here." means "_____ of them are not here."
We must do something to _____ factories _____waste water into the river before it is cleaned.