The limits of a person’s intelligence, generally speaking, are fixed at birth, but ________he reaches these limits will depend on his environment.
—It's cloudy outside. Please take an umbrella.— __________.
—I’m going to cut the big tree down? —What ________ ?
—I like coffee with nothing in it. What about you? —I prefer coffee ________ sugar.
So far, several ships have been reported missing ________ the coast of Bermuda.
I don't remember___________ to the airport that year.