13. 2) which ( I , can be omitted)
3) that (I, can be omitted)
4) who (I, can be omitted)
5) which (I, can be omitted)
6) that (I, can be omitted)
7) that (I, can be omitted)
8) that (I, can't be omitted)
9) whose (I, can't be omitted)
10) that (I, can't be omitted)
11) who (I, can't be omitted)
12) which (I, can't be omitted)
13) that (I, can be omitted)
14. 2-C 3-B 4-A 5-C 6-A 7-C 8-C 9-B 10-A
Sper ca te-am ajutat...