Необходимо вставить в предложения: in, with, of, at.1) Teachers must be

Необходимо вставить в предложения: in, with, of, at.
1) Teachers must be patient ......... children.
2) You must study for ......... least five years to become a doctor.
3) Some children are scared ......... living statues.
4) You need to be ......... good shape to work as a firefighter.
5) Inzhu has to arrive ........ work at 9 am.