_____ is even more important is that as the earth cooled down, water began to appear on its surface.
John asked Tom ______ give him a lift to the office.
She wrote ______ second book, which turned out to be still popular with ______ young.
It was only after World War II had drawn to a close ______ in the United States.
—Doug, where is your coach, Chow? —See, he ______ by a group of journalists.
Many memories of old times were ______ by the conversation we had during the get-together.