Your mother will be with you if she knows your grades.
What are the rules? –We must keep our hair _______, and we must wear the school uniform.
Jill and Anna were tired, but _______ of them stopped to have a rest.
Which of the following signs can we most probably see in a museum?
–_______ is it from here to the airport? –About forty kilometers.
–Will the air in our city get cleaner? –_______. Everybody likes clean air.