bring on	to cause to happen
call on	to pay a short visit
catch on	to become popular
come on	to hurry/ to be broadcast
count on	to rely on
drag on	to pass tediously
get on	to progress/ to move on
go on	to continue
hold on	to wait
live on	to lie on sth?
look on	to regard
pick on	to be deliberately unkind
send on	to forward
take on	to acquire
try on	to put on to see whether it fits
turn on	to switch on