Everyone should learn something about first aid,for every second will ________ in an emergency.
Few pleasures can equal _____ of a cool drink on a hot day.
I found _______impossible for _______to work out the maths problem.
Give the message to ______ is at the table.
We should always keep ______ well-informed of the changing information.
If you want to change for a double room you’ll have to pay ___$15.