单项选择题
Tonnage tax is officially based upon the figures obtained from the （）.
A.Admeasurement Certificate B.deadweight scale C.displacement scale D.Load Line Certificate
单项选择题 This Certificate will remain in force until May 1，2009. （）.
单项选择题 This certificate is issued under the authority of the said Government，and it will remain in （） until Jan 1 2008.
单项选择题 The undersigned （）that he is duly authorized by the said Government to issue this certificate.
