Father ____ for London on business upon my arrival, so I didn’t see him.
A. has left B. left C. was leaving D. had left
I _____ in London for many years, but I’ve never regretted my final decision to move back to China.
A. have lived B. was living C. lived D. had lived
Ladies and gentlemen, please fasten your seat belts. The plane________.
A. takes off B. is taking off C. has taken off D. took off
Look at the timetable. Hurry up! Flight 4026 ____ off at 18:20.
A. will be taken B. took C. takes D. has taken
—Shall I help you, sir?
—I appreciate ____ if you do me the favor to pack the luggage.
A. / B. that C. you D. it
Helping others is a habit, ___ you can learn even at an early age.
A. it B. that C. one D. those
