I know Mr. Shuili; we ______ to each other at an English lecture.
| A．were introduced | B．are been introduced | C．are introduced | D．had been introduced |
With more than 200 million views worldwide, the latest video Gangnam Style __________ very popular since it __________.
| A．has become; was uploaded |
| B．became; uploaded |
| C．became; was uploaded |
| D．has become; is uploaded |
When residents learned on Wednesday that only one of the 13 workers trapped underground __________，they burst into tears.
| A．was survived |
| B．would survive |
| C．has survived |
| D．had survived |
Why did so many people stand by while the woman __________ in broad daylight?
| A．is being robbed |
| B．had been robbed |
| C．was being robbed |
| D．has been robbed |
We are confident that the environment __________ by our further efforts to reduce pollution.
| A．had been improved |
| B．will be improved |
| C．is improved |
| D．was improved |
I didn't think I'd like the movie, but actually it __________ pretty good.
| A．has been |
| B．was |
| C．had been |
| D．would be |