--- I rang you at about ten, but there was no reply. --- Oh, that was probably _____ I was seeing the doctor.
--- Which newspaper shall I buy? --- ______, whatever they have in the shop.
Father ____ for London on business upon my arrival, so I didn’t see him.
I _____ in London for many years, but I’ve never regretted my final decision to move back to China.
Ladies and gentlemen, please fasten your seat belts. The plane________.
Look at the timetable. Hurry up! Flight 4026 ____ off at 18:20.