Question

17- His mother has been there with him......last weeks
a: for b: Since c: just . d: yet​

Answer 1

I think it is Since

Step-by-step explanation:

Because, "His mother has been there with him ... last week" *quote* *unquote* Placing 'since' would make it, "His mother has been there with him since last week" *quote* *unquote*