—Does he know how to work out the problem?---Yes, he has ___ a good idea to solve it. ----Yes, he has ___ a good idea to solve it.
—Oh, I failed again—Don’t lose heart. One more effort, ________ you will succeed.
I told Sally how to get here, but perhaps I _______ for her.
The old house, in front of ________ there is an apple tree, is ________ I used to live.
She took her son, ran out of the house, ________ him in the car and drove quickly to the nearest doctor’s office.
You should put on the notices ________ all the people may see them.