The doctor has worked with patients of this kind for eight years, so he knows what ________ in his job.
We will do it ourselves __________ asking others to help.
Briggs will __________ as general manager when Mitchell retires.
Rod loves __________ clocks. However, he never manages to put them together again.
When you need money or anything else, don't hesitate __________ me for help.
The situation forced my mother and I exchanged our roles as child and caretaker, making me grow up much faster than the __________ child.