【小题1】In ________（德国）there are different kinds of high schools.
【小题2】With ________（知识）we have conquered nature and invented steamers, trains and airplanes.
【小题3】We decided to ________（归还）blow for blow.
【小题4】Did you ________（触动）my plate just now?
【小题5】Their __________（成功）is no accident.