______ arrive late for class. You must be ____ time.
They often leave the boy alone at home. They think that he’s old enough to look after _____.
He met many problems------ he was going over his lessons.
One of the wonders of the _____ world is the pyramids in Egypt.
We all agree that a pair of shoes _____________a nice present.
—Hello, this is Amy. Is Tom there?—___________________