Mary and I have been close friends ______ we met each other 10 years ago.
| A．when | B．since | C．until | D．as |
--- Did you tell Jack the news?
--- Oh, I forgot. I______ him soon.
| A．will tell | B．am going to tell |
| C．am to tell | D．tells |
Mary is ill today. If she _____, she ____ here at school
| A．were not ill；would be |
| B．had been ill；wouldn't have been |
| C．were ill；should have been |
| D．hadn't been ill；could be |
All the preparations for the task _________, and we’re ready to start.
| A．complete | B．have completed |
| C．had been completed | D．have been completed |
_________as one of the most important inventions of the time, the computer helps people living in different countries to do a lot of things.
| A．Knowing | B．Known |
| C．To know | D．Know |
Anyone _______ wants to learn something can sign up for the online courses.
| A．which | B．who |
| C．whose | D．whom |