English for more than six years, he can speak and work very well with that businessman from England.
| A．To have learned | B．To learn | C．Learning | D．Having learned |
The news came as no surprise to me．I _____ for some time that the factory was going to shut down．
| A．knew | B．had known |
| C．have known | D．know |
Dan Brown，_____ author of The Da Vinci Code，is _____ very famous American writer．
| A．a;the | B．the;the |
| C．the;a | D．a;a |
Jack，it’s too hot here．______ I open the window？
| A．Shall | B．Will | C．Should | D．Would |
_____ he promised that he wouldn’t be late，he didn’t arrive until the end of the party
| A．Since | B．Although |
| C．Because | D．Until |
Since the new speed limits ______，the number of accidents in the area has fallen strikingly．
| A．were introduced |
| B．introduced |
| C．have been introduced |
| D．have introduced |