It is no use _________ to persuade him ________ smoking because he has been addicted to it since he wasyoung.
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.
—Shall I help you, sir? —I appreciate ____ if you do me the favor to pack the luggage.