I regret ________ that you have failed the exam, but what you should do now is not to regret ______ so much time but to seize every moment from now on.
| A．to inform; wasting | B．informing; to waste |
| C．to inform; to waste | D．informing; wasting |
He is so addicted to smoking that __________ seems to be no chance of talking him into quitting.
| A．this |
| B．what |
| C．it |
| D．there |
The Roman Empire __________ for several centuries.
| A．exists |
| B．existed |
| C．was existed |
| D．is existing |
-How long has the United Nations __________？
-__________1945.
| A．come into existence; In |
| B．been in existence; Since |
| C．been in existence; From |
| D．come into existence; For |
It seems __________ the poor guy is going to die of __________.
| A．that; scare |
| B．as though; fright |
| C．as if; frighten |
| D．that; scared |
We saw a __________ big snake in the grass yesterday, which __________ all of us to death.
| A．frightened; frightened |
| B．frightened; frightening |
| C．frightening; frightened |
| D．frightening; frightening |