--Have you ever come to Anhui before?
--No. It is the first time that I ______ here.
| A．come | B．have come |
| C．am coming | D．came |
Our TV sets sell well, but ten years ago no one could have imagined such a big share in the market that they ____.
| A．were having | B．had had | C．were to have | D．had |
— Look! How long ________ like this?
—Three weeks! It’s usual here that rain _______ without stopping these days of the year.
| A．has it rained; pours | B．has it been raining; pours |
| C．is it raining; is pouring | D．does it rain; pours |
I won’t tell the student the answer to the math problem until he ______ on it for more than an hour.
| A．has been working | B．will have worked |
| C．will have been working | D．had worked |
Ladies and gentlemen, please fasten your seat belts. The plane _______.
| A．takes off | B．is taking off |
| C．has taken off | D．took off |
I _______ in London for many years, but I’ve never regretted my final decision to move back to China.
| A．lived | B．was living |
| C．have lived | D．had lived |