_____the size of the universe, some researchers believe that there is life beyond our planet.
| A．Consider | B．To consider |
| C．Considered | D．Considering |
With thick snow __________ the ground, our city looks more beautiful.
| A．covers |
| B．covering |
| C．covered |
| D．to cover |
Kim __________ several miles a day to her office since she wishes to have more exercise.
| A．covers |
| B．takes |
| C．gets |
| D．recovers |
I was almost __________ to death at the sight of the __________ scene.
| A．frightening; frightening |
| B．frightening; frightened |
| C．frightened; frightening |
| D．frightened; frightened |
It's reported that women with demanding jobs are __________ to suffer a heart attack.
| A．as likely twice |
| B．likely twice as |
| C．twice as likely |
| D．twice likely as |
It is __________ that he has been addicted to the drugs and has difficulty quitting it.
| A．obviously |
| B．apparently |
| C．possibly |
| D．likely |