After Queen Elizabeth officially opened the 2012 Summer Olympics, London became the first city ________ three Olympic Games in history.
| A．to have hosted | B．hosting |
| C．hosted | D．having hosted |
---- Guess what! I have passed my driving test last week.
---- ______!
| A．Congratulations | B．Celebrations | C．Good luck | D．All right |
San Diego’s Zoo and Sea World are places where residents and visitors alike can enjoy r animals and plants in shows and exhibits, ___ in part by San Diego’s climate.
| A．made it possible | B．making it possible |
| C．making possible | D．made possible |
Not until all the fish died in the riverhow specious the pollution was.
| A．did the villagers realize | B．that the villagers realized |
| C．the villagers did realize | D．didn’t the villagers realize |
To help a friend solve the problem troubling him,.
| A．a friend should be made known of his difficult situation |
| B．a man should be equipped with the kind of knowledge required |
| C．nothing is better than offering of knowledge required |
| D．keeping one’s promises is most important |
Contemporary English is quite different from Old English. There has never been a yearthe language was not changing.
| A．that | B．when | C．for | D．until |