¾ Who invented _______ cell phone? ¾ I don’t know. Maybe _______ European.
—I apologize for not being able to join you for dinner. —________.We’ll get together later.
A new_____bus service to Tianjin Airport started to operate two months ago.
It is difficult for us to learn a lesson in life_____we’ve actually had that lesson.
Lucy has_____all of the goals she set for herself in high school and is ready for new challenges at university.
Hardly could he_____this amount of work in such a short time.