Anyvisitorstotheproductionfacilitiesmust____asecuritypassfromtheinformationdeskatthefrontentrance.
All_____for time off must go through the Human Resources Department first.
To be____for the corporate shareholder's program, you must have been working here for at least three consecutive years.
The little girl is ignorant _____ the basic rules of English grammar。
Inmostcountries,themetricsystemhasbeen_____forallmeasurement.