.It is very difficult to his mind because he is always changing his mind.
As for the accident this time, I think it is Richard you, to blame.
On ________ our flight would be delayed, we made some other arrangements.
I want to be liked and loved for _______ I am inside.
What worried the woman most was ______ to visit her sick son in hospital.
The thief used a ladder that had been ______ by some workmen, and climbed over the wall.