Mistakes don’t just happen, but they occur for a reason. What we ought to do is find out the reason and then making the mistakes _____________.
Tom is good at maths, so I think he is the student ____can help you to work out this problem.
He lives in a big house ____ windows face south.
Family fights are the things ____I feel upset.
The____ teacher has much ____in teaching English.
The boss left Jack ____the company when he was in hospital.