All of the students were ______ by the ______ speech given by the headmaster.
Paris is ______ most beautiful city, where you can see ______ famous Eiffel Tower.
--Where' s Mr Green? --Oh, he _________ Canada.
Beyond _______ stars, the astronaut saw nothing but ________ space.
The headmaster ________for more than two weeks.
The trees must _______three times a week.