_________with so many contributions to the newspaper, he has little time to chat with friends on the net.
| A．Occupied | B．Have been occupied | C．To occupy | D．Having occupied |
．______ the satellite launch drawing near, the research workers put their hearts to the test and always stayed up late.
| A．As | B．Because | C．With | D．While |
It was in the lab, ________ was taken charge of by Professor Curie, _______ they did the experiment.
| A．where; that | B．that; that | C．which; that | D．which; where |
–Guess what, we’ve got our visas for a short-term visit to the UK this summer.
--How nice! You a different culture then.
| A．will be experiencing | B．have experienced |
| C．have been experiencing | D．will have experienced |
_________ the right kind of training, these teenage soccer players may one day grow into the international stars.
| A．Giving | B．Having given | C．To give | D．Given |
After he left college , he was employed in an international company and __
___there ever since .
| A．worked | B．has worked | C．had worked | D．was working |