I think its imperfect of haber+past participle.
i hope this helps u
1)los
2)lo
3)la
4)lo
5)los
6)la
7)los
8)las
9)la
10)la
11)lo
12)la
13)lo
14)las
15)los
B.
1)los
2)las
3)los
4)la
5)lo
6)las
7)lo
8)la
9)la
10)lo
C is the answer from reading the text
1. Pacto
2. Serguridad
3. Cero
4. Economia
Hope that helped *smiles*
