It suddenly ______ to me that we could use a computer to do the job.

The treatment will continue until the patient reaches the point _____ he can walk steadily

I want to ring him＿＿＿to know the reason why he rang＿＿＿while I was speaking yesterday

You’d better use

do you think of a house supplied by Lovell —- _______ you buy a home from Lovell, the company promises to buy it back at the same price after three years.