单项选择题
Now that the valve is not worth （）, I suggest it （）.
A.to repair；to renew B.repairing；be renewed C.repairing；will be renewed D.to repair；to be renewed
单项选择题 （） to damage the protective coating on the inner side of the shell.
单项选择题 The following engine parts are found damaged and we are about to （） compensation from the shipyard.
单项选择题 （）, the metal expands.
