He _______ in a university for five years, but now he runs a company of his own.
In our class there are 46 students, ______ half wear glasses.
My mother opened the drawer to _________ the knives and spoons.
Tom was about to close the windows_____ his attention was caught by a bird.
—Is it all right if I keep this photo? —_______.
Mr. Black is very happy because the clothes made in his factory have never been .