—How _______ do you chat with your aunt on the Internet?
—Now and then, though we don’t have much in common.
| A．often | B．soon | C．long | D．much |
Tom took a taxi to the airport, only ________ his plane high up in the sky.
| A．to find | B．finding |
| C．being found | D．to have found |
Li Na is a Chinese tennis player, who is said ________ the world championship last year.
| A．to win | B．to have won |
| C．won | D．to have been won |
If he takes up this job, he will have no choice but ________ a much greater challenge.
| A．meets | B．meeting |
| C．to meet | D．meet |
New technologies have made ________ easier to enjoy life than ever before.
| A．that | B．this |
| C．one | D．it |
The California Earthquake took place at 5:15 a.m., and _______ for only a minute.
| A．having lasted | B．to last |
| C．lasted | D．lasting |