1.these men are my brothers
2.are these dollars?
3.these are our managers
4.are they students?
5.they are ladies
6.they are mice
7.these are Englishmen
8.are those/these Germans
9.are they your children?
10.are these her babies? (thanks to syuzannasahakya)
11.they are nice cities
12.those are his wives?
13.they are beautiful women
14.are these new offices?
15.are those your boxes?
в 11-ом предложении проблема, поэтому не уверен