My shoes are cheaper than _____.
-- Did you read a book about customs last week? -- Yes, I found ______ very useful to know the customs of foreign countries.
--You used to be quiet, ____you? --Yes, and I used to be very shy.
-- How do you study a test? -- I studylistening to tapes.
--What’s the matter? --They said I shouldn’t be allowed here. They don’t allowin the waiting room.
--Listen! Tom is singing in the next room. --It _______ be Tom. He has gone to Shanghai.