单项选择题
A.will set B.shall set C.set D.sets
After he （） the test, the engineer put down the results...
单项选择题After he （） the test, the engineer put down the results.
A.has finished B.finishes C.had finished D.would finish
Now that the valve is not worth （）, I suggest it （）.A.t...
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
（） to damage the protective coating on the inner side o...
单项选择题（） to damage the protective coating on the inner side of the shell.
A.Care to be not taken B.Care not to be taken C.Care to be taken not D.Not care to be taken
