Mr. Jones enjoys _____ his children out from long walks.
Mr. Jones enjoys \_\_\_\__ his children out from long walks.
doing
It is no use _____ to remember only grammar rules.
It is no use \_\_\_\__ to remember only grammar rules.
Jim’s job is to keep his boss _____ of the latest development of that product in Europe.
Jim’s job is to keep his boss \_\_\_\__ of the latest development of that product in Europe.