Answer:
The first three translations:
1. Alice has to study for the exam. 'on behalf of' ?
3. Antonio leaves for work at six. 'specific time' or 'employment'.
Explanation:
I didn't say the second translation because you already did that one :)
'por' means 'by'
'para' means 'for'.
So you could choose one of the 'enter answer(s)' to say why they used por or para. Its hard to explain but I hope this helps.
The answer is probably iceberg. i can't tell for sure because there are no given answers
La chica dormir casi ocho horad
la profesora pedir la tarea de espanol
yo hablar con mis amigos en la internet
tu y yo conseguir tres aplicaciones para mi tableta
1- tu entiendes
2- yo digo
3- vosotros piensan
3- ellos duermen