It is terrible. The cat miaowed a lot at night recently. It _________ a baby crying.
Ted told us ______ funny story, but he forgot ______ ending himself.
Just then it suddenly to me that the two of us could share the dinner together .
Look! That’s Amy. —It _______ be her. She’s gone to Xi’an.
It is required in a recent study suggesting the importance of teenagers’ communication with other children of the same age.