All parking signs have now been placed _________.
A. in practice B. in position
C. in danger D. in mind
He wanted to look for a(n) _________suited to his abilities.
A. pension B. prevention
C. occupation D. permission
How many members have __________ registered in the club?
A. officially B. official
C. office D. officer
Time _________, we will pay a visit to him before we leave.
A. permit B. permitted
C. to permit D. permitting
She was on the point of going out _________ the telephone rang.
A. while B. when
C. as D. the moment
The level of __________ in the river was falling.
A. population B. prescription
C. presentation D. pollution
