1)I go to school ......... 8 o"clock . in или at 2)....... is this ball? Harry"s. What...

Question

1)I go to school ......... 8 o"clock .
in или at
2)....... is this ball? Harry"s.
What или Whose
3)Is it ........... armchair?
an или a
помогите пожалуйста очень нужно!!!!

Answer 1

1) I go to school ....at..... 8 o"clock . 
in или at 
2)....Whose... is this ball? Harry"s. 
What или Whose 
3) Is it ..an......... armchair?