Both, Both Of, Either, Either Of, Neither, Neither Of

Fill in the blanks with both, both of, either, either of, neither, neither of.

1............... sisters are beautiful.

2............... them are beautiful.

3............... his parents are doctors.

4I liked ............... those shirts.

5I like ............... shirts. Which one should I choose?

6............... restaurant is cheap.

7............... these options is acceptable to me.

8............... parent was at home.

9I haven't watched ............... these movies.

10............... them are quite intelligent.

11............... us was able to find a solution to the problem.

Select 2 answers.

12I like them ...............