They put forward a lot of plans at the meeting, but none of _______ were carried out in their work.
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.