People say that Vancouver is Canada’s most beautiful city, ______by mountains and the Pacific Ocean.
The shop assistants there were not friendly to me because of ____ .
“How is your tour around the North Lake? Is it beautiful?” “It ____ be, but it is now heavily polluted.”
You had better go at once, ____ you?
Every morning the pupils read the texts ____ in the classroom.
The number of people invited ____ fifty, but a number of them ____ absent for different reasons.