Wyrażenia przyimkowe na R

Pytanie 1
Have you written a reply _ your uncle yet?
Pytanie 2
They are doing lots of research _ a vaccine for malaria
Pytanie 3
I have great respect _ people who work for charities
Pytanie 4
Practically everyone has a good relationship _ our teacher
Pytanie 5
Do you need more reminders _ the dangers of smoking?