Bobo mo di nman nakkatulong​

David works in the police force. he is mainly in charge of crime prevention, detection, and maintaining order. he works at the rank of a .

Someone answer my questions i need them asap

Ireally, really need with this asap. i don't understand spanish prepositions and when they should be used. the questions are:fiesta con juan el fin de semana pasado. el parque está casa. es una lástima que haya tantos lago. el jefe quiere inmediatamente. the answers can be one of the following: en, con, de, a i will award !