Write the correct possessive adjective or pronoun for these sentences

write the correct possessive adjective or pronoun for these sentences 
1.this dessert is..........................but you can have it. [ I ]
2........................car is so dirty I can't even tell what color it is [you]
3.the cat is in a good mood.It's just had ..................breakfast [it]
4.Mark and I did .......................homework,but Jennifer didn't do..............[we/she]
5.It wasn't ...................mistake,it was................for getting the food order wrong [I/they]
6.she gave him .........................telephone number ,and he gave her......................[she/he]
7.I think ........................garden is bigger than......................[they/we]
8.Is she a friend of..................? No,she is a cousin of ..............[you/I]
9.......................car wasn't working ,so he used...................[he/she]
10...........................computer needs to be fixed ,but ........................is working [I/he]