The city government is planning to build a factory to deal with the industry waste，but when and where to build it________.
| A．haven’t been decided | B．aren’t decided |
| C．hadn’t been decided | D．hasn’t been decided |
—Have you known Dr. Jackson for a long time?
—Yes, since she _________ the Chinese Society.
| A．has joined | B．joins |
| C．had joined | D．joined |
—Have you got any job offers?
—No. I _________.
| A．waited | B．had been waiting |
| C．have waited | D．am waiting |
We first met on a train in 2000. We both felt immediately that we _________ each other for years.
| A．knew | B．have known |
| C．had known | D．know |
—Do you think we should accept that offer?
—Yes, we should, for we _________ such bad luck up till now, and time _________ out.
| A．have had; is running | B．had; is running |
| C．have; has been run | D．have had; has been run |
—I’m sure Andrew will win the first prize in the final.
—I think so. He _________ for it for months.
| A．is preparing | B．was preparing |
| C．had been preparing | D．has been preparing |