单项选择题
A.in B.on C.till D.to
The International Loadline Certificate is a document in...
单项选择题The International Loadline Certificate is a document indicating （）of the various loadlines of the vessel.
A.functions B.importances C.actions D.positions
This Certificate will remain in force until May 1,2009....
单项选择题This Certificate will remain in force until May 1,2009.This Sentence refers to （） of the Certificate.
A.the validity B.the time C.the date D.the issue
