A.on B.at C.in D.above
A.Standing by on VHF frequency B.Coming to VHF frequency C.VHF frequency. is the best place for you to stay by D.remaining in frequency. and do not change
A.I am going to change to VHF channel B.I am certainly going to change to VHF channel C.Changing to VHF channel D.VHF channel. has been changed