—— Do young people in that country like to be engaged in teaching?
—— Not really, for teachers strongly feel that school systems____ them ____.
| A．let; down | B．let; off | C．let; go | D．let; alone |
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 |