since
for
from
in
Answer is Wrong!
Answer is Right!
The correct answer is since.
- Since is used to indicate a point in time in the past from which something continues to happen or be the case.
- For is used to indicate a period of time during which something happens or is the case.
- From is used to indicate the starting point of a period of time or distance.
- In is used to indicate a particular place or position.
In this case, we are looking for a word that indicates that Angel has been sending English learning videos for a period of time that started in July 2014. The only word that fits this description is since.