England. B. Placentia was destroyed .Р C. Ship-yards were built . D. King Henry died .Р___48. Charles made John Flamsteed try to find ______ .Р A. how to tell the time B. hot to build shipsР C. a way for sailors to tell their positions at sea D. a place to set up a telescopeР___49. Who made the first clock which could tell the time at sea ?Р A. Harrison B. Flamsteed C. Henry D. CharlesР___50. Without Flamsteed's work ,it would be ___ for sailors to know where they were .РA. impossible B. possible C. probable D. certainР阅读理解Р1--20 ABDCB D CDABC ACBDB Р21-40 CDBCD DBABB BBABD ACDDDР41-50 BDACB CACAA Р Р Р阅读理解Р1--20 ABDCB D CDABC ACBDB Р21-40 CDBCD DBABB BBABD ACDDDР41-50 BDACB CACAA