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18.It was so cold that they kept the fire _______all night. A. to burn B. burn C. burning D. burned 19.The salesman scolded the girl caught __ and let her off. A. to have stolen B. to be stealing C. to steal D. stealing 20.He was disappointed to find his suggestion_______. A. turning down B. turned down C. to be turned down D. to turn down 21.The murderer was brought in ,with his hands ______ behind his back. A. being tied B. having tied C. to be tied D. tied 22.Tom kept quiet about the accident _______lose his job. A. not in order to B. so as not to C. in order to not D. not so as to 23.They have had a long and bitter struggle _____ their living conditions. A. to improving B. for improving C. to improve D. improve 24.To master a foreign language,______. A. a lot of practice is needed B. it needs a lot of practice C. practice is in need of | 
