Although he knew little about the work done in the field, he succeeded ____other more experienced experimenters failed.
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.
The political situation in Libya will become even worse unless some measures ______.